3a+9-4a+1=18

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Solution for 3a+9-4a+1=18 equation:


Simplifying
3a + 9 + -4a + 1 = 18

Reorder the terms:
9 + 1 + 3a + -4a = 18

Combine like terms: 9 + 1 = 10
10 + 3a + -4a = 18

Combine like terms: 3a + -4a = -1a
10 + -1a = 18

Solving
10 + -1a = 18

Solving for variable 'a'.

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

Add '-10' to each side of the equation.
10 + -10 + -1a = 18 + -10

Combine like terms: 10 + -10 = 0
0 + -1a = 18 + -10
-1a = 18 + -10

Combine like terms: 18 + -10 = 8
-1a = 8

Divide each side by '-1'.
a = -8

Simplifying
a = -8

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