can you tell me how to do this problem. Simplify thank you.

The 4x and the -12x can be combined together with the result of -8x

If z = 2

then we can replace z with 2 in the expression:

-8ZX + 4ZY + 20 Z

-8(2)X + 4(2)Y + 20 (2)

-16X + 8Y + 40

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