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4 June, 05:51

A system of equations is shown below: Equation A: 4c = d - 8 Equation B: c = 5d + 8 Which of the following steps should be performed to eliminate variable d first?

A. Multiply equation B by 4

B. Multiply equation A by - 5

C. Multiply equation A by 4

D. Multiply equation B by 5

+5
Answers (1)
  1. 4 June, 06:40
    0
    Equation A: 4c = d - 8

    Equation B: c = 5d + 8

    Multiply Equation A by - 5:

    Equation A: - 20c = - 5d + 40

    Equation (1) + (2):

    -19c = 48

    Answer: B. Multiply equation A by - 5
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