-18=6a+7-a

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Solution for -18=6a+7-a equation:


Simplifying
-18 = 6a + 7 + -1a

Reorder the terms:
-18 = 7 + 6a + -1a

Combine like terms: 6a + -1a = 5a
-18 = 7 + 5a

Solving
-18 = 7 + 5a

Solving for variable 'a'.

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

Add '-5a' to each side of the equation.
-18 + -5a = 7 + 5a + -5a

Combine like terms: 5a + -5a = 0
-18 + -5a = 7 + 0
-18 + -5a = 7

Add '18' to each side of the equation.
-18 + 18 + -5a = 7 + 18

Combine like terms: -18 + 18 = 0
0 + -5a = 7 + 18
-5a = 7 + 18

Combine like terms: 7 + 18 = 25
-5a = 25

Divide each side by '-5'.
a = -5

Simplifying
a = -5

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