Question 186803
5m-2n=4
3m+n=9 multiply by 2 & add.
5m-2n=4
6m+2n=18
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11m=22
m=22/11
m=2 ans.
5*2-2n=4
10-2n=4
-2n=4-10
-2n=-6
-n=-6/-2
n=3 ans.
Proof:
3*2+3=9
6+3=9
9=9