Question

1x+7=18-2x

Answer 1

2+y=-7+2y
Subtract y from each side
2=-7+y
Add 7 to each side
9=y

Answer 2

dont you have to divide

Answer 3

You only have to divide if the y has a value. For example:
2y=10
Divide each side by 2
y=5
But in your case, the y had no value so there was no need to divide.

Answer 4

ohhhhhhhhh

Answer 5

thank u very much

Answer 6

No problem. :)