Q. Solve the following system of linear equations by substitution method:

2x – y = 2

x + 3y =15

July 1, 2021

By Elliana

2 thoughts on “Q. Solve the following system of linear equations by substitution method:<br /><br /> 2x – y = 2<br /><br /> x + 3y =15<br /”

1. Ye Meli I’d Hai..ye aapka koi doremon ya nobita nhi h..xD

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2. Answer:

   y=4, x=3

   Step-by-step explanation:

   Use the second equation to get x

   x+3y=15

   x=-3y+15

   Substitute to the first equation

   2x-y=2

   2(-3y+15)-y=2

   -6y+30-y=2

   -7y=-30+2

   -7y=-28, divide both sides by – 7

   y=4

   Substitute y=4 to the second equation

   x+3y=15

   x+3(4)=15

   x+12=15

   x=15-12

   x=3

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