-4=3a-a

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Solution for -4=3a-a equation:


Simplifying
-4 = 3a + -1a

Combine like terms: 3a + -1a = 2a
-4 = 2a

Solving
-4 = 2a

Solving for variable 'a'.

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

Add '-2a' to each side of the equation.
-4 + -2a = 2a + -2a

Combine like terms: 2a + -2a = 0
-4 + -2a = 0

Add '4' to each side of the equation.
-4 + 4 + -2a = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -2a = 0 + 4
-2a = 0 + 4

Combine like terms: 0 + 4 = 4
-2a = 4

Divide each side by '-2'.
a = -2

Simplifying
a = -2

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