![\"Subtraction](\"http://www.mathskey.com/userfiles/image/Library/subtraction_property_of_equality.gif\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The equation is a![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c7a8c800d2df7d176b09fff75181eb8f.png\")
(12)= 6 \ \
a+12=6 (Product of two opposite signs is positive)
\Apply subtraction property of equality: Subtract 12 from each side.
\a +1212 = 612
a + 0 = 612 (Apply additive inverse property: 1212 = 0)
a = 6 (Apply additive identity property: a + 0 = a)
a = 6 (Subtract: 612= 6)![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step2.JPG\")
Check:
\To check the solution, substitute a = 6 in original equation.
a+12 = 6 ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=cf88eb4b75e2e087ff1d68b5148e102c.png\")
6+12 = 6
6= 6 (Add:6+12 = 6)
The statement is true.
\![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The value of a = 6