5a-7a=8a

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Solution for 5a-7a=8a equation: 


Simplifying
5a + -7a = 8a

Combine like terms: 5a + -7a = -2a
-2a = 8a

Solving
-2a = 8a

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-8a' to each side of the equation.
-2a + -8a = 8a + -8a

Combine like terms: -2a + -8a = -10a
-10a = 8a + -8a

Combine like terms: 8a + -8a = 0
-10a = 0

Divide each side by '-10'.
a = 0.0

Simplifying
a = 0.0

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