Question 259887: solve by the substitution method and then two ordered pairs!
9x-9y=-9
3x+13=y Found 2 solutions by Alan3354, stanbon:Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! solve by the substitution method and then two ordered pairs!
9x-9y=-9 --> 3x-3y = -3 --> 3x = 3y-3
3x+13=y
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Sub for 3x into the 2nd eqn
3y-3 + 13 = y
3y+10 = y
2y = -10
y = -5
x = -6
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The only ordered pair of the solution is (-6,-5)
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PS Most people would have subbed for y into the 1st eqn, but that's not the only way to do it.
You can put this solution on YOUR website! solve by the substitution method and then two ordered pairs!
9x-9y=-9
3x+13=y
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Simplify the 1st equation:
x - y = -1
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Substitute for "y" in this equation and solve for "x":
x - (3x+13) = -1
x - 3x - 13 = -1
-2x = 12
x = -6
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Substitute into x-y = -1 to solve for "y":
-6 - y = -1
y = -5
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Solution:
x = -6, y = -5
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9x-9y=-9
3x+13=y
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x-y = -1
3x+13 = y
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y = x+1
y = 3x+13
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Cheers,
Stan H.
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