Substitution method to solve system of equations
posted by Tasha on .
y  2x = 5
3y  x = 5
Please help me out.

change to first equation to
y = 2x  5
now sub that into the second one
3y  x = 5
3(2x5)  x = 5
6x  15  x = 5
5x = 20
x = 4
now put that value of x into y = 2x  5
y = 2(4)  5
= 85
= 3
check in
#1 : 3  8 = 5 checks!
#2 : 9  4 = 5 checks!