Question

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?

Multiply equation B by 4.
Multiply equation A by –5.
Multiply equation A by 4.
Multiply equation B by 5.

Answer 1

isn't it the second one?

Answer 2

That would make the coefficients of d opposite and equal absolute value. That would allow you to eliminate d.

Answer 3

as an answer?

Answer 4

Can't provide answer, but that procedure would allow you to solve by eliminating d, and if you did it first, you eliminate d first.

Answer 5

ok so d is the answer

Answer 6

That ain't what you said.

Answer 7

Here is what you said: "Isn't it the second one?"

Answer 8

i know but your telling me d!

Answer 9

No I am not telling you d!, I am telling you if you follow thru on your first post you can deliminate d the variable. I am not saying the choice d.