SOLUTION: Elimination using multiplication 4c-3d=22 2c-d=10

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Question 583319: Elimination using multiplication
4c-3d=22
2c-d=10
Answer by mananth(16946) About Me  (Show Source):
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4c-3d=22
2c-d=10
multiply by -2
we get -4c+2d=-20
add this to first equation
4c-3d=22
-4c+2d=-20
-d=2
d=-2
plug d in second equation
2c-d=10
2c-2=10
2c-2=10
2c=10-2
2c=8
/2
c=4