30=a+6a+9

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Solution for 30=a+6a+9 equation:


Simplifying
30 = a + 6a + 9

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

Combine like terms: a + 6a = 7a
30 = 9 + 7a

Solving
30 = 9 + 7a

Solving for variable 'a'.

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

Add '-7a' to each side of the equation.
30 + -7a = 9 + 7a + -7a

Combine like terms: 7a + -7a = 0
30 + -7a = 9 + 0
30 + -7a = 9

Add '-30' to each side of the equation.
30 + -30 + -7a = 9 + -30

Combine like terms: 30 + -30 = 0
0 + -7a = 9 + -30
-7a = 9 + -30

Combine like terms: 9 + -30 = -21
-7a = -21

Divide each side by '-7'.
a = 3

Simplifying
a = 3

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