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. Since , x=4.
Answer: .
The solution is x=4 and y =1 or the point (4,1)
I hope the above steps were helpful.
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Dr J Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website! How do you solve by substitution of linear equation?
2x+y=9
y=x-3
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The 2nd eqn has y isolated, so sub for y into the 1st eqn.
2x+y=9
2x + (x-3) = 9
3x - 3 = 9
3x = 12
x = 4
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y = x-3 = 4-3
y = 1