3a+1+a=-15

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Solution for 3a+1+a=-15 equation:


Simplifying
3a + 1 + a = -15

Reorder the terms:
1 + 3a + a = -15

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

Solving
1 + 4a = -15

Solving for variable 'a'.

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

Add '-1' to each side of the equation.
1 + -1 + 4a = -15 + -1

Combine like terms: 1 + -1 = 0
0 + 4a = -15 + -1
4a = -15 + -1

Combine like terms: -15 + -1 = -16
4a = -16

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

Simplifying
a = -4

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