algebra 2
posted by mel on .
If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to x from the first equation is substituted into the second equation.
x + y = 2
3x + 2y = 9

x + y = 2 Multiply both sides by 2
2 x + 2 y = 4
2 y = 4  2 x
3 x + 2 y = 9
3 x + 4  2 x = 9
x + 4 = 9
x = 9  4 = 5
x + y = 2
5 + y = 2
y = 2  5 =  3