Question

solve the following pair of linear equations by method of substitution 2x-5y=4,3x-8y=5

Answer 1

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Answer 2

HERE YOUR ANSWER:-

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2x-5y=4.........equation(1)
3x-8y=5..............equation(2)

Equation(1)

2x-5y=4
2x=4+5y

x=(4+5y)/2............equation(A)


Equation(2)
3x-8y=5.........equa.(2)


Put value of (A) in (2)

3[(4+5y)/2]-8y=5
(12+15y)/2-8y=5
(12+15y-16y)/2=5..........(BY TAKING LCM)
12-y=5×2
12-y=10
y=12-10
y=2


Equation(1)
2x-5y=4

Put value of y in any equation.

2x-5y=4
2x-5×2=4
2x-10=4
2x=4+10
2x=14
x=14/2
x=7




HOPE IT HELPS YOU!



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