Question

What is the solution to the system

C= ?
D= ?

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Answer 1

c=29/20

d=13/5

Explanation:

4c+2d=11 A

7d=82-44c 7d+44c=82 B

The first equation multiply by 11

and we get 44c+22d=121 C

C-B=44c+22d-7d-44c=39

15d=39

d=39/15=13/5

so c= 29/20