a+3a-18=

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Solution for a+3a-18= equation:


Simplifying
a + 3a + -18 = 0

Reorder the terms:
-18 + a + 3a = 0

Combine like terms: a + 3a = 4a
-18 + 4a = 0

Solving
-18 + 4a = 0

Solving for variable 'a'.

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

Add '18' to each side of the equation.
-18 + 18 + 4a = 0 + 18

Combine like terms: -18 + 18 = 0
0 + 4a = 0 + 18
4a = 0 + 18

Combine like terms: 0 + 18 = 18
4a = 18

Divide each side by '4'.
a = 4.5

Simplifying
a = 4.5

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