\ \
\
The equation is .
The value of a is 20
(Substitute 20 for x)
(Multiply: )
So a = 20 is a solution of the equation .
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
\ \
\ \
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=af3109adc8c1f31e3c5122237609d9c2.png\")
. ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=421743fa5dcb05434e7cb0243e114872.png\")
(Substitute 20 for x)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c93d3e5b4ab5c57fdff1b6af4873bb16.png\")
(Multiply: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3a4c0d73415ba29be94a02d20ca8f411.png\")
) ![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=af3109adc8c1f31e3c5122237609d9c2.png\")
.