8a=-4a+84

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Solution for 8a=-4a+84 equation: 


Simplifying
8a = -4a + 84

Reorder the terms:
8a = 84 + -4a

Solving
8a = 84 + -4a

Solving for variable 'a'.

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

Add '4a' to each side of the equation.
8a + 4a = 84 + -4a + 4a

Combine like terms: 8a + 4a = 12a
12a = 84 + -4a + 4a

Combine like terms: -4a + 4a = 0
12a = 84 + 0
12a = 84

Divide each side by '12'.
a = 7

Simplifying
a = 7

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