15-2a=31+2a

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Solution for 15-2a=31+2a equation:


Simplifying
15 + -2a = 31 + 2a

Solving
15 + -2a = 31 + 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.
15 + -2a + -2a = 31 + 2a + -2a

Combine like terms: -2a + -2a = -4a
15 + -4a = 31 + 2a + -2a

Combine like terms: 2a + -2a = 0
15 + -4a = 31 + 0
15 + -4a = 31

Add '-15' to each side of the equation.
15 + -15 + -4a = 31 + -15

Combine like terms: 15 + -15 = 0
0 + -4a = 31 + -15
-4a = 31 + -15

Combine like terms: 31 + -15 = 16
-4a = 16

Divide each side by '-4'.
a = -4

Simplifying
a = -4

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