3a-1+7a+6=

Solution for 3a-1+7a+6= equation:

Simplifying
3a + -1 + 7a + 6 = 0

Reorder the terms:
-1 + 6 + 3a + 7a = 0

Combine like terms: -1 + 6 = 5
5 + 3a + 7a = 0

Combine like terms: 3a + 7a = 10a
5 + 10a = 0

Solving
5 + 10a = 0

Solving for variable 'a'.

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

Add '-5' to each side of the equation.
5 + -5 + 10a = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 10a = 0 + -5
10a = 0 + -5

Combine like terms: 0 + -5 = -5
10a = -5

Divide each side by '10'.
a = -0.5

Simplifying
a = -0.5