SOLUTION: using the substitution method to solve the following system of equations. x + y = 3 2x + 2y = 10 Please show work

Question 628002: using the substitution method to solve the following system of equations.
x + y = 3
2x + 2y = 10
Please show work
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
multiply the first by 2
2x+2y=6
2x+2y=10
subtract
0=-4
No they don't so there is no solution.
They are parallel.
y=-x+3
divide the second by 2
x+y=5
y=-x+5
they have the same slope (-1)
I didn't use substitution.
x=3-y
2(3-y)+2y=10
6-2y+2y=10
6=10
no they don't
there is no solution
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