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

@Godlovesme

Answer 2

so if u want to eliminate d we should have two opposite but the same constant
like in this case we have 5d in the second equation so we want the first one to have the same constant (5) but with different sign
got it?

Answer 3

yes

Answer 4

so what do u think is the asnwer?

Answer 5

D

Answer 6

close but remember it has to be a different sign, in the second eqn we have positive 5 so we need ....

Answer 7

-5

Answer 8

awesome :D

Answer 9

u got the asnwer right? :P

Answer 10

b thanks!!!!!!!!!!!

Answer 11

anytime(: