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OpenStudy (anonymous):
Solve y = 3x – 12 by the substitution method. 2x – 3y = -13 Answer (7, 9) (4, 3) (1, 5) (0, 8)
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OpenStudy (anonymous):
substitute 3x-12 for y so 2x-3(3x-12)=-13 Can you get the answer from this equation?
TheSmartOne (thesmartone):
So just substitute 2x-3(3x-12)=-13 2x-9x+36=-13 -7x+36=-13 -7x=-49 x=-7
TheSmartOne (thesmartone):
Oops x=7 not -7
TheSmartOne (thesmartone):
And since A is the only one with 7 as the x value, A is the answer
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