-9=10+a

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Solution for -9=10+a equation:


Simplifying
-9 = 10 + a

Solving
-9 = 10 + 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.
-9 + -1a = 10 + a + -1a

Combine like terms: a + -1a = 0
-9 + -1a = 10 + 0
-9 + -1a = 10

Add '9' to each side of the equation.
-9 + 9 + -1a = 10 + 9

Combine like terms: -9 + 9 = 0
0 + -1a = 10 + 9
-1a = 10 + 9

Combine like terms: 10 + 9 = 19
-1a = 19

Divide each side by '-1'.
a = -19

Simplifying
a = -19

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