solve following pair of equation graphically 2x - 7y = 6, 5x - 8y = -4
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Step-by-step explanation:
2x - 7y = 6
5x - 8y = -4
by multiplying 1st equation with 5 and 2nd equation with 2 we get
=5× (2x - 7y ) = 6×5
=10x-35y=30------------eq1
=2× (5x - 8y )= -4×2
=10x-16y=-8--------------eq2
by subtracting two eqs we get
=10x-35y=30
=10x-16y=-8
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-19y=38
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y=-2
=10x-16(-2)=-8
=10x=40
x=4
so value of x=4 ,y=-2
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