![\"\"](\"http://c4anything.com/userfiles/image/steps_images/step1.JPG\")
The equation is 15 = b ![\"\"](\"http://c4anything.com/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c7a8c800d2df7d176b09fff75181eb8f.png\")
(65).
15 = b + 65
\According to subtraction property of equality: if a = b, then a c = b c.
15 65 = b + 65 65 (Subtract 65 from each sides)
15 65 = b (Additive inverse property: 65 65 = 0)
b = 40 (Subtract: 15 65 = 40)
![\"\"](\"http://c4anything.com/userfiles/image/steps_images/step2.JPG\")
Check:
\To check the solution, substitute b = 40 in original equation.
15 = b + 65![\"\"](\"http://c4anything.com/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=cf88eb4b75e2e087ff1d68b5148e102c.png\")
15 = 40 + 65
\
15 = 15 (Add: 40 + 65 = 15)
Compare the values, the equation is true. The solution is b = 40.
![\"\"](\"http://c4anything.com/userfiles/image/steps_images/solution.JPG\")
The value of b = 40.