15-a+4a=6

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Solution for 15-a+4a=6 equation: 


Simplifying
15 + -1a + 4a = 6

Combine like terms: -1a + 4a = 3a
15 + 3a = 6

Solving
15 + 3a = 6

Solving for variable 'a'.

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

Add '-15' to each side of the equation.
15 + -15 + 3a = 6 + -15

Combine like terms: 15 + -15 = 0
0 + 3a = 6 + -15
3a = 6 + -15

Combine like terms: 6 + -15 = -9
3a = -9

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

Simplifying
a = -3

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