Equation A: 3c = d − 8 Equation B: c = 4d + 8 Which of the following steps should be performed to eliminate variable d first?

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asked Nov 27, 2018 156k views

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Mohamad Amin Moslemi · Answer 1 · 2018-11-30T15:14:47+0000

3c = d - 8 ....multiply by -4
c = 4d + 8
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-12c = -4d + 32 (result of multiplying by -4)
c = 4d + 8
-------------add
-11c = 40.....as u can see, the d's have been eliminated

answer : multiply equation A by -4

Equation A: 3c = d − 8 Equation B: c = 4d + 8 Which of the following steps should be performed to eliminate variable d first?

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