![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The equations are
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9a0ae993f93e530b875a634269b0da4c.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2774738fd5cb3acb49e4d32ce9999f5d.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4278dd874c443d1997ad0a85349904e4.png\")
Multiply the equation (2) by 3.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=abe71a72767f7879c3d82b313c9a390b.png\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step2.JPG\")
Add equation (4) and Equation (3).
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=cfca8d4618ad7b63d15020619aff422a.png\")
Multiply the equation (2) by 4.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=492469147d2d1291e962414849d773ac.png\")
Add equation (6) and Equation (1).
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8ef8b1dab54fb401d321d66e3171f239.png\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step3.JPG\")
Find the Greatest Common factor (GCF) for the numbers 21, 45, 54.
\Prime factors of 27: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=bc853a90b4ff04863810f360eea94dcb.png\")
Prime factors of 45: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=91a720ddeeb9cfd0788f4a597ee52856.png\")
Prime factors of 54: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2cfb6f72227ae00b8adee607ccea0555.png\")
There is two 3 in common. The GCF is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f569b4ba2ed789df8cdc97cba7b25fbd.png\")
Divide each side of the equation (5) by GCF.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5162321324fc55da0512b5d6fbecd70e.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7547740a3e1e679288d116cef592efb8.png\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step4.JPG\")
Add equation (6) and Equation (1).
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=48d316cdc8083b68a480dcc669629099.png\")
Divide each side of the equation by 3.
\![\"\"](\"file:///C:\\DOCUME~1\\Ram\\LOCALS~1\\Temp\\msohtml1\\01\\clip_image037.gif\")
![\"\"](\"/userfiles/image/steps_images/step5.JPG\")
Substitute 3 for b in equation (1).
\![\"\"](\"file:///C:\\DOCUME~1\\Ram\\LOCALS~1\\Temp\\msohtml1\\01\\clip_image040.gif\")
![\"\"](\"file:///C:\\DOCUME~1\\Ram\\LOCALS~1\\Temp\\msohtml1\\01\\clip_image042.gif\")
(Subtract 6 from each side).
![\"\"](\"file:///C:\\DOCUME~1\\Ram\\LOCALS~1\\Temp\\msohtml1\\01\\clip_image044.gif\")
(Subtract; ![\"\"](\"file:///C:\\DOCUME~1\\Ram\\LOCALS~1\\Temp\\msohtml1\\01\\clip_image046.gif\")
).
![\"\"](\"file:///C:\\DOCUME~1\\Ram\\LOCALS~1\\Temp\\msohtml1\\01\\clip_image048.gif\")
(Divide each side by 3).
![\"\"](\"/userfiles/image/steps_images/step6.JPG\")
Substitute 7 for a and 3 for b in equation (2).
\![\"\"](\"file:///C:\\DOCUME~1\\Ram\\LOCALS~1\\Temp\\msohtml1\\01\\clip_image051.gif\")
![\"\"](\"file:///C:\\DOCUME~1\\Ram\\LOCALS~1\\Temp\\msohtml1\\01\\clip_image053.gif\")
(Multiply:![\"\"](\"file:///C:\\DOCUME~1\\Ram\\LOCALS~1\\Temp\\msohtml1\\01\\clip_image055.gif\")
)
![\"\"](\"file:///C:\\DOCUME~1\\Ram\\LOCALS~1\\Temp\\msohtml1\\01\\clip_image057.gif\")
(Subtract: ![\"\"](\"file:///C:\\DOCUME~1\\Ram\\LOCALS~1\\Temp\\msohtml1\\01\\clip_image059.gif\")
)
![\"\"](\"file:///C:\\DOCUME~1\\Ram\\LOCALS~1\\Temp\\msohtml1\\01\\clip_image061.gif\")
(Subtract 14 from each side).
![\"\"](\"file:///C:\\DOCUME~1\\Ram\\LOCALS~1\\Temp\\msohtml1\\01\\clip_image063.gif\")
(Subtract: ![\"\"](\"file:///C:\\DOCUME~1\\Ram\\LOCALS~1\\Temp\\msohtml1\\01\\clip_image065.gif\")
)
The solutions is ![\"\"](\"file:///C:\\DOCUME~1\\Ram\\LOCALS~1\\Temp\\msohtml1\\01\\clip_image067.gif\")
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
The solution is .