Question

solve by the elimination method the following pair of linear equation
3x-y=7
2x+5y+1=0
​

Answer 1

Step-by-step explanation:

First of all

let be equation 1 and 2

then common both equation

Answer 2

Step-by-step explanation:

3x-y-7 =0-----(1)

2x+5y+1 =0----(2)

(1)×2 =>> 6x-2y-14 = 0---(3)

(2)×3 =>> 6x+15y+3 = 0---(4)

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(4)-(3) =>> 17y+17 =0

=>> 17y = -17

=>> y=-1

Putting y= -1 in equation(1)

=>> 3x-(-1)-7=0

=>> 3x+1-7=0

=>> 3x= 6

=>> x= 2

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Therefore ,

x=2 & y=-1

Hope this will help you