Question 241406
8x - 5y = 31 
x - 4y = 14 multiply by -8 & add.
-8x+32y=-112
8x-5y=31
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27y=-81
y=-81/27
y=-3 ans.
8x-5*-3=31
8x+15=31
8x=31-15
8x=16
x=16/8
x=2 ans.
Proof:
2-4*-3=14
2+12=14
14=14