4a+9+a+3=

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Solution for 4a+9+a+3= equation:


Simplifying
4a + 9 + a + 3 = 0

Reorder the terms:
9 + 3 + 4a + a = 0

Combine like terms: 9 + 3 = 12
12 + 4a + a = 0

Combine like terms: 4a + a = 5a
12 + 5a = 0

Solving
12 + 5a = 0

Solving for variable 'a'.

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

Add '-12' to each side of the equation.
12 + -12 + 5a = 0 + -12

Combine like terms: 12 + -12 = 0
0 + 5a = 0 + -12
5a = 0 + -12

Combine like terms: 0 + -12 = -12
5a = -12

Divide each side by '5'.
a = -2.4

Simplifying
a = -2.4

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