31+7=a+9

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Solution for 31+7=a+9 equation:


Simplifying
31 + 7 = a + 9

Combine like terms: 31 + 7 = 38
38 = a + 9

Reorder the terms:
38 = 9 + a

Solving
38 = 9 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
38 + -1a = 9 + a + -1a

Combine like terms: a + -1a = 0
38 + -1a = 9 + 0
38 + -1a = 9

Add '-38' to each side of the equation.
38 + -38 + -1a = 9 + -38

Combine like terms: 38 + -38 = 0
0 + -1a = 9 + -38
-1a = 9 + -38

Combine like terms: 9 + -38 = -29
-1a = -29

Divide each side by '-1'.
a = 29

Simplifying
a = 29

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