-13=a-9

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Solution for -13=a-9 equation:


Simplifying
-13 = a + -9

Reorder the terms:
-13 = -9 + a

Solving
-13 = -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.
-13 + -1a = -9 + a + -1a

Combine like terms: a + -1a = 0
-13 + -1a = -9 + 0
-13 + -1a = -9

Add '13' to each side of the equation.
-13 + 13 + -1a = -9 + 13

Combine like terms: -13 + 13 = 0
0 + -1a = -9 + 13
-1a = -9 + 13

Combine like terms: -9 + 13 = 4
-1a = 4

Divide each side by '-1'.
a = -4

Simplifying
a = -4

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