Question 259434: Solve the folloing systems of equations using the substitution method and check
3a+b=4
a-2b=6
please help
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Solve the folloing systems of equations using the substitution method and check
3a+b=4
a-2b=6
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Solve the 2nd equation for "a":
a = 2b+6
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Substitute for "a" and solve for "b":
3(2b+6) + b = 4
6b + 18 + b = 4
7b = - 14
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b = -2
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Since a = 2b+6, a = 2*-2 + 6 = 2
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Solution: a = 2, b = -2
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Cheers,
Stan H.
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