13-5=13+3a

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Solution for 13-5=13+3a equation:


Simplifying
13 + -5 = 13 + 3a

Combine like terms: 13 + -5 = 8
8 = 13 + 3a

Solving
8 = 13 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
8 + -3a = 13 + 3a + -3a

Combine like terms: 3a + -3a = 0
8 + -3a = 13 + 0
8 + -3a = 13

Add '-8' to each side of the equation.
8 + -8 + -3a = 13 + -8

Combine like terms: 8 + -8 = 0
0 + -3a = 13 + -8
-3a = 13 + -8

Combine like terms: 13 + -8 = 5
-3a = 5

Divide each side by '-3'.
a = -1.666666667

Simplifying
a = -1.666666667

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