Answer:
x = 4
Step-by-step explanation:
Given
=
( cross- multiply )
3x = 12 ( divide both sides by 3 )
x = 4
In system A, the first equation multiply by 4
8x - 4y = 12 (1st)
3x + 4y = 10 (2nd)
--------------------add
11x = 22
So answer is B.
The height could be 2 and the width 10 or the height could be 10 and the width could be 2.