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MathematicsMathematics
21 March, 21:38

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.

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Answers (1)
  1. 21 March, 22:07
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    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.
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Home » Mathematics » 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.
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