Question

Which of the following expressions is equivalent to 2x + y − 4y + 8?

a) 2x − 3y + 8
b) 3x − 4y + 8
C) 2x + 3y + 8
D) 2x − 4y + 8

Answer 1

I agree. If y is one for example 1-4 is -3

Answer 2

a) 2x - 3y + 8

Explanation:

Problem: 2x + y - 4y + 8

Solve: y - 4y

Put it back into the expression: 2x - 3y + 8