13a+80=31a-100

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Solution for 13a+80=31a-100 equation:


Simplifying
13a + 80 = 31a + -100

Reorder the terms:
80 + 13a = 31a + -100

Reorder the terms:
80 + 13a = -100 + 31a

Solving
80 + 13a = -100 + 31a

Solving for variable 'a'.

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

Add '-31a' to each side of the equation.
80 + 13a + -31a = -100 + 31a + -31a

Combine like terms: 13a + -31a = -18a
80 + -18a = -100 + 31a + -31a

Combine like terms: 31a + -31a = 0
80 + -18a = -100 + 0
80 + -18a = -100

Add '-80' to each side of the equation.
80 + -80 + -18a = -100 + -80

Combine like terms: 80 + -80 = 0
0 + -18a = -100 + -80
-18a = -100 + -80

Combine like terms: -100 + -80 = -180
-18a = -180

Divide each side by '-18'.
a = 10

Simplifying
a = 10

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