2a-31=10a+9

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Solution for 2a-31=10a+9 equation:


Simplifying
2a + -31 = 10a + 9

Reorder the terms:
-31 + 2a = 10a + 9

Reorder the terms:
-31 + 2a = 9 + 10a

Solving
-31 + 2a = 9 + 10a

Solving for variable 'a'.

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

Add '-10a' to each side of the equation.
-31 + 2a + -10a = 9 + 10a + -10a

Combine like terms: 2a + -10a = -8a
-31 + -8a = 9 + 10a + -10a

Combine like terms: 10a + -10a = 0
-31 + -8a = 9 + 0
-31 + -8a = 9

Add '31' to each side of the equation.
-31 + 31 + -8a = 9 + 31

Combine like terms: -31 + 31 = 0
0 + -8a = 9 + 31
-8a = 9 + 31

Combine like terms: 9 + 31 = 40
-8a = 40

Divide each side by '-8'.
a = -5

Simplifying
a = -5

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