Solve the following pairs of linear equations by cross multiplication method:
1. 2x+y-35=0; 3x+4y-65=0
2. 6x-y=3; 7x+4y=9
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Answer:
6x-y=3____(1)×4
7x+4y=9____(2)
_______
24x-4y=12
7x+4y=9
______
31x=21
x=21/31
6×21/31-y=3
126/31-y=3
-y=3-126/31
-y=93-126/31
y=33/31
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