Question

What should be added to both sides of this equation to solve for the variable?
7 = -13 + d
help me please.

Answer 1

look at the sign in front of the constant (-13) how do you make it 0
do you add or subtract 13

Answer 2

subtract

Answer 3

7 = -13 +d
+13 +13
d=21

Answer 4

if you subtract 13 form -13 you get -26not 0 so you need to add 13

Answer 5

so after you add what do you do next

Answer 6

you get solution...go here http://www.twiddla.com/536745

Answer 7

was it 7 or 1