exam Maths Puzzle Numerical Ability

Problem:

Solve for y:
-2x + 4y = 8x + 12

Thanks for helping.

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exam Other Question

I do not know if that is the topic but here are my questions

Solve: 3/8y - 4 = 2

A. -5 1/3
B. 2 1/4
C. 14
D. 16

Solve:
3x-9 = x = 2
A. 2/11
B. 11/2
C. -2
D - 11/2 Please help me solve this problem 2b^2+13b-7