Solve for a 5a+7b=8a-9

Math
5a+7b=8a-9
Move all terms containing a to the left side of the equation.
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Subtract 8a from both sides of the equation.
5a+7b-8a=-9
Subtract 8a from 5a.
-3a+7b=-9
-3a+7b=-9
Subtract 7b from both sides of the equation.
-3a=-9-7b
Divide each term by -3 and simplify.
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Divide each term in -3a=-9-7b by -3.
-3a-3=-9-3+-7b-3
Cancel the common factor of -3.
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Cancel the common factor.
-3a-3=-9-3+-7b-3
Divide a by 1.
a=-9-3+-7b-3
a=-9-3+-7b-3
Simplify each term.
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Divide -9 by -3.
a=3+-7b-3
Dividing two negative values results in a positive value.
a=3+7b3
a=3+7b3
a=3+7b3
Solve for a 5a+7b=8a-9

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