SOLUTION: Would someone be able to help me with this, I appreciate it. Solve the following system by graphing. x + y = 6 x - y = 3

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Question 143504: Would someone be able to help me with this, I appreciate it.
Solve the following system by graphing.
x + y = 6
x - y = 3
Answer by nabla(475)   (Show Source): You can put this solution on YOUR website!
plot y=6-x and y=x-3 and see the place where they intersect.

Looks like y=3/2 and x=9/2.
Check via substitution:
Solved by pluggable solver: SOLVE linear system by SUBSTITUTION
Solve:
We'll use substitution. After moving 1*y to the right, we get:
, or . Substitute that
into another equation:
and simplify: So, we know that y=1.5. Since , x=4.5.

Answer: .
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