9a-42=3a+18

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Solution for 9a-42=3a+18 equation:


Simplifying
9a + -42 = 3a + 18

Reorder the terms:
-42 + 9a = 3a + 18

Reorder the terms:
-42 + 9a = 18 + 3a

Solving
-42 + 9a = 18 + 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.
-42 + 9a + -3a = 18 + 3a + -3a

Combine like terms: 9a + -3a = 6a
-42 + 6a = 18 + 3a + -3a

Combine like terms: 3a + -3a = 0
-42 + 6a = 18 + 0
-42 + 6a = 18

Add '42' to each side of the equation.
-42 + 42 + 6a = 18 + 42

Combine like terms: -42 + 42 = 0
0 + 6a = 18 + 42
6a = 18 + 42

Combine like terms: 18 + 42 = 60
6a = 60

Divide each side by '6'.
a = 10

Simplifying
a = 10

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