a+3a-5a=-78

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Solution for a+3a-5a=-78 equation: 


Simplifying
a + 3a + -5a = -78

Combine like terms: a + 3a = 4a
4a + -5a = -78

Combine like terms: 4a + -5a = -1a
-1a = -78

Solving
-1a = -78

Solving for variable 'a'.

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

Divide each side by '-1'.
a = 78

Simplifying
a = 78

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