Question 483136
A laboratory used 120 fence posts in an experiment comparing two types of paint.
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Six fewer than twice as many fence posts were painted with paint A as were painted with paint B. 
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How many fence posts were painted with paint A? Paint B?" 
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Equations:
A + B = 120 posts
A = 2B -6
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Subtract for "A" and solve for "B":
2B-6 + B = 120
3B = 126
B = 42 (# of B-painted posts)
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Solve for "A":
A = 2B-6
A = 2*42-6
A = 84-6
A = 76 (# of A-painted posts)
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Cheers,
Stan H.
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