18=8a-7-3a

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Solution for 18=8a-7-3a equation:


Simplifying
18 = 8a + -7 + -3a

Reorder the terms:
18 = -7 + 8a + -3a

Combine like terms: 8a + -3a = 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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