Do 9-3 first to get 6. Next, do 7-6. The answer is 1.
14x+2=12x
[subtract 2 on both sides]
14x=12x-2
[subtract 12x on both sides]
2x=-2
[divide 2 on both sides]
x=-1
The answer is choice A.
In this problem, we are shrinking the poster by 1/4 of its size.
Which means you need to divide the sides by 4
For width:
For length:
-1 is the opposite reciprical (perpendicular)