31=10-7a

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Solution for 31=10-7a equation:


Simplifying
31 = 10 + -7a

Solving
31 = 10 + -7a

Solving for variable 'a'.

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

Add '7a' to each side of the equation.
31 + 7a = 10 + -7a + 7a

Combine like terms: -7a + 7a = 0
31 + 7a = 10 + 0
31 + 7a = 10

Add '-31' to each side of the equation.
31 + -31 + 7a = 10 + -31

Combine like terms: 31 + -31 = 0
0 + 7a = 10 + -31
7a = 10 + -31

Combine like terms: 10 + -31 = -21
7a = -21

Divide each side by '7'.
a = -3

Simplifying
a = -3

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