The answer is -8. Simply add the numbers together arithmetically as you would for the problem two plus two. To check your work, a calculator is the best option.
8+7 = 15
15 -7 = 8
false. because 5plus 3 plus 7 equals, 15, and 15 plus three is not seven
-8
75 / 15 + 4 + 7 = 16
7+x=15 x=8
-8 plus 15 = 7
Yes. 5 + 3 + 7 = 15 and 5 + 7 + 3 = 15
no 15
n = 8
15d + 7 = 7d + 15 is an equation in one variable, d.
x = -7