8-13=a-4

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Solution for 8-13=a-4 equation:


Simplifying
8 + -13 = a + -4

Combine like terms: 8 + -13 = -5
-5 = a + -4

Reorder the terms:
-5 = -4 + a

Solving
-5 = -4 + 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.
-5 + -1a = -4 + a + -1a

Combine like terms: a + -1a = 0
-5 + -1a = -4 + 0
-5 + -1a = -4

Add '5' to each side of the equation.
-5 + 5 + -1a = -4 + 5

Combine like terms: -5 + 5 = 0
0 + -1a = -4 + 5
-1a = -4 + 5

Combine like terms: -4 + 5 = 1
-1a = 1

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

Simplifying
a = -1

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