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91Ó°ÊÓ

Evaluate each expression if x=−4, y=7, a²Ô»åz=−9

−4y+2z−7z

Short Answer

Expert verified

−4y+2z−7z=109

Step by step solution

01

Step 1. Given information.

x=−4, y=7and z=−9

And given expression is:−4y+2z−7z

02

Step 2. Description of step.

To solve the given expression

−4y+2z−7z

Put the value of y, and z in the expression, as

role="math" localid="1643121266689" −4y+2z−7z=−47+2−9−7−9=−28−18+63=−46+63=46+63=109

Thus, −4y+2z−7z=109.

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