a+9=1+3a

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Solution for a+9=1+3a equation:


Simplifying
a + 9 = 1 + 3a

Reorder the terms:
9 + a = 1 + 3a

Solving
9 + a = 1 + 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.
9 + a + -3a = 1 + 3a + -3a

Combine like terms: a + -3a = -2a
9 + -2a = 1 + 3a + -3a

Combine like terms: 3a + -3a = 0
9 + -2a = 1 + 0
9 + -2a = 1

Add '-9' to each side of the equation.
9 + -9 + -2a = 1 + -9

Combine like terms: 9 + -9 = 0
0 + -2a = 1 + -9
-2a = 1 + -9

Combine like terms: 1 + -9 = -8
-2a = -8

Divide each side by '-2'.
a = 4

Simplifying
a = 4

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