Question

A system of equations is shown below:

Equation A: 2c = d − 8
Equation B: c = 3d + 8

Which of the following steps should be performed to eliminate variable d first?

Multiply equation B by 2.
Multiply equation A by 2.
Multiply equation B by 3.
Multiply equation A by −3.

Answer 1

@geerky42

Answer 2

@pooja195

Answer 3

Fill in the box

\[\Large \boxed{ \ ^ \ } \ d + 3d = 0d\]

Answer 4

whats the answer

Answer 5

any ideas of what might go in there?

something plus 3d gives 0d

what is that "something" ?

Answer 6

b?

Answer 7

b plus 3d = 0d ?

Answer 8

no the answer

Answer 9

i thik its b or c

Answer 10

what dou think?

Answer 11

ok why not try this out

fill in the blank

\[\Large \underline{ \ \ \ \ \ } + 3 = 0\]

what goes in the blank?

Answer 12

-3

Answer 13

so that applies to the 3d as well

Answer 14

-3d + 3d = 0d

Answer 15

so the answer is D?

Answer 16

Multiply equation A by −3

Answer 17

how do we turn that "d" in equation A into -3d ?

Answer 18

thank you.

Answer 19

i just need the answer

Answer 20

@geerky42 thats the right answer right?