7x - 8y - 11 = 0
8x - 7y - 7 = 0
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7x - 8y = 11 ........eq 1
8x - 7y = 7 .........eq 2
Multiply eq 1 by 8 & eq 2 by 7
56x - 64y = 88
56x - 49y = 49
By elimination method
56x - 64y = 88
56x - 49y = 49
- + -
-15y = 39
y = – 39/15 = - 2.6
put value of y in eq 1
we get: 7x - 8 (-39/15) = 11
7x + 312/15 = 11
7x = - 98/10
x = - 98/70 = - 1.4
so, x = -1.4 & y = -2.6
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