5a-1-3a=-31

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Solution for 5a-1-3a=-31 equation: 


Simplifying
5a + -1 + -3a = -31

Reorder the terms:
-1 + 5a + -3a = -31

Combine like terms: 5a + -3a = 2a
-1 + 2a = -31

Solving
-1 + 2a = -31

Solving for variable 'a'.

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

Add '1' to each side of the equation.
-1 + 1 + 2a = -31 + 1

Combine like terms: -1 + 1 = 0
0 + 2a = -31 + 1
2a = -31 + 1

Combine like terms: -31 + 1 = -30
2a = -30

Divide each side by '2'.
a = -15

Simplifying
a = -15

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