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Mathematics, 27.01.2021 19:50 maribelsalgado3

Josh needs to solve the system of equations below. 4z + 5y = 7

2z - 3y = 9

He decides to use the elimination method to cancel out the z terms in order to first solve for y. Josh uses the following steps:

Step 1: 4z + 5y = 7

-2(2z) - 3y = 9

Step 2: 4z + 5y = 7

-4z - 3y = 9

Step 3: 2y = 16

Step 4: y = 8

Did Josh use the correct steps to solve for y?

A
No, Josh should have multiplied the entire second equation by -2.

B
No, Josh should have multiplied the entire second equation by -4.

C
Yes, Josh correctly solved for y.

D
No, Josh should have multiplied 2z by 2 instead of by -2.

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Answers: 1

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Josh needs to solve the system of equations below. 4z + 5y = 7

2z - 3y = 9

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