Solve: We'll use substitution. After moving 6*y to the right, we get: , or . Substitute that
into another equation: and simplify: So, we know that y=-2. Since , x=5.
Answer: .
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website! What is the substition method for
18x+6y = 78
12x+54y=-48
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3x+ y = 13
2x+9y = -8
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27x + 9y = 9*13
2x + 9y = -8
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Subtract and solve for "y":
25x = 125
x = 5
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Solve for "x":
3x + y = 13
3*5 + y = 13
y = -2
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Cheers,
Stan H.
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