-4a=84+3a

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Solution for -4a=84+3a equation: 


Simplifying
-4a = 84 + 3a

Solving
-4a = 84 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
-4a + -3a = 84 + 3a + -3a

Combine like terms: -4a + -3a = -7a
-7a = 84 + 3a + -3a

Combine like terms: 3a + -3a = 0
-7a = 84 + 0
-7a = 84

Divide each side by '-7'.
a = -12

Simplifying
a = -12

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