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Molodets [167]
4 years ago
10

The work of a student to solve a set of equations is shown:

Mathematics
1 answer:
Ivahew [28]4 years ago
3 0
Step 1. Equation B could not have simplified out to 3y= 3 - 4z because Equation A's original equation was y= 15 - 2z. That means after the multiplication by -3, -3(y)= -3(15 - 2z) it would equal -3y= -45 + 6z.
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dexar [7]

Answer:

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