18a-30=6a-9

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Solution for 18a-30=6a-9 equation:


Simplifying
18a + -30 = 6a + -9

Reorder the terms:
-30 + 18a = 6a + -9

Reorder the terms:
-30 + 18a = -9 + 6a

Solving
-30 + 18a = -9 + 6a

Solving for variable 'a'.

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

Add '-6a' to each side of the equation.
-30 + 18a + -6a = -9 + 6a + -6a

Combine like terms: 18a + -6a = 12a
-30 + 12a = -9 + 6a + -6a

Combine like terms: 6a + -6a = 0
-30 + 12a = -9 + 0
-30 + 12a = -9

Add '30' to each side of the equation.
-30 + 30 + 12a = -9 + 30

Combine like terms: -30 + 30 = 0
0 + 12a = -9 + 30
12a = -9 + 30

Combine like terms: -9 + 30 = 21
12a = 21

Divide each side by '12'.
a = 1.75

Simplifying
a = 1.75

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