Question

solve 7 1/2 = x+3 divided by 2

Answer 1

15=2x+6 ===> x=9/2

Answer 2

Nope, assuming this is what she meant:
7.5 = (x+3)/2
(15/2) = (x+3)/2

2*(15/2) = x+3
15 = x+3
15-3 = x
x=12

plug it in and see 15/2 = 15/2

Answer 3

or do you mean 7*(1/2) ??

Answer 4

7.5 = x + 3 divided by 2

Answer 5

ok then 12 is your x value