the answer to y=2x-9 and x+3y=8 using substiution
Substitute the first equation into the second equation.
x + 3(2x - 9) = 8
x + 6x - 27 = 8
7x = 35
x = 5
Then, substitute that into the first equation.
y = 2x - 9
y = 2(5) -9
y = 10 - 9
y = 1
Equation two was x+3y=8.
5 + 3(1) = 8
5 + 3 = 8
8 = 8