SOLUTION: Solve each equation or system of equations. y=x-3 7x-2y=21

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Question 93326: Solve each equation or system of equations.
y=x-3
7x-2y=21
Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
y=x-3 then
7x-2(x-3)=21
7x-2x+6=21
5x=21-6
5x=15
x=15/5
x=3 answer
y=5+3
y=8 answer
proof
7*3-2(3-3)=21
21-2*0=21
21=21