Question

x – 2y = 7 and y = –x + 1

I need to solve using the substitution process

x + 3y = 5 and –2x + y = 4

I need to solve using the elimination process

Answer 1

Answer:

x - 2y = 7

substitute y = -x+1 in the above equation

so it will be

x-2( -x+1) =7

-x²+x +2x -2 =7

-x²+3x =9

hope it helps you

this is substitution method