Question

Solve by substitution:
8x-3y=17
8x-y=11

Answer 1

subtract both eq and U'll get -2y=6--->y=-3
replace -2 in the 2nd or 1st eq to find x 8x+3=11
8x=8
x=8/8=1
solution(1:-3)

Answer 2

from 2nd we have: y=8x-11

8x-3(8x-11)=17
8x-24x+33=17
-16x=-16
16x=16
x=1

Answer 3

substitution is sooo labor intensive, id rather eliminate...

8x-3y=17 ; *-1
8x- y=11

-8x +3y =-17
8x - y = 11
-------------
2y = -6

y = -3