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A system of equations is shown below: Equation A: 3c = d − 8 Equation B: c = 4d + 8 Which of the following steps should be performed to eliminate variable d first? Multiply equation A by −4. Multiply equation
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A system of equations is shown below:

Equation A: 3c = d − 8
Equation B: c = 4d + 8

Which of the following steps should be performed to eliminate variable d first?

Multiply equation A by −4.
Multiply equation B by 3.
Multiply equation A by 3.
Multiply equation B by 4.

User Systempuntoout
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2 Answers

1 vote

Answer:

The answer is A. Multiply equation A by −4.

Hope This Helps!

User Reutsey
by
7.7k points
0 votes
probably the first one "multiply equation A by -4". In order to cancel them out out multiply the first equation by negative 4 and then you add both equations once you add both equations -4+4=0 so they cancel out.

User Merichle
by
8.0k points
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