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Two equations are given below: a − 3b = 4 a = b − 2 What is the solution to the set of equations in the form (a, b)? (−2, −2) (−3, −1) (−9, −7) (−5, −3)
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Two equations are given below: a − 3b = 4 a = b − 2 What is the solution to the set of equations in the form (a, b)? (−2, −2) (−3, −1) (−9, −7) (−5, −3)
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May 3, 2018
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Two equations are given below:
a − 3b = 4
a = b − 2
What is the solution to the set of equations in the form (a, b)?
(−2, −2)
(−3, −1)
(−9, −7)
(−5, −3)
Mathematics
middle-school
Alexander Seredenko
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Alexander Seredenko
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solving by elimination I got rid of the a first by multiplying top by -1.
So I ended up with b being -3.......so the last one must be the answer
Atreyagaurav
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May 5, 2018
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Atreyagaurav
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First, you want all the variables to be on one side:
a - 3b = 4
a - b = -2
Now you want to eliminate one of the variables, in this case a is easiest.
Subtract the second equation from the first and you're left with:
-2b = 6
so b = -3
Sub the value of b back into either of the equations and solve for x:
a - (-3) = -2
a = -5
So your answer is (-5,-3)
Joe Waller
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May 8, 2018
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Joe Waller
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