Subtract. 8x - 8y +9 5x - 8y -z ____________ A) 3x + z + 9 B) 3x - 16y - z + 9 C) 3x - z + 9

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asked Feb 14, 2019 215k views

4 votes

Subtract.

8x - 8y +9
5x - 8y -z
____________

A) 3x + z + 9
B) 3x - 16y - z + 9
C) 3x - z + 9

Mathematics
middle-school

Kirk Powell asked

by Kirk Powell

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2 Answers

7 votes

Subtract.

8x - 8y +9

5x - 8y -z

____________

A) 3x + z + 9

B) 3x - 16y - z + 9

C) 3x - z + 9

Answer: A

Eliarms answered Feb 15, 2019

by Eliarms

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3 votes

(8x - 8y + 9) - (5x - 8y - z) = 3x + z + 9

8 - 5 = 3
-8 - (-8) = 0
9 - 0 =9
0 - (-z) = z

so it is written 3x +z +9

Idaho answered Feb 20, 2019

by Idaho

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