1a-6=-(9+a)

Solution for 1a-6=-(9+a) equation:

Simplifying
1a + -6 = -1(9 + a)

Reorder the terms:
-6 + 1a = -1(9 + a)
-6 + 1a = (9 * -1 + a * -1)
-6 + 1a = (-9 + -1a)

Solving
-6 + 1a = -9 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
-6 + 1a + a = -9 + -1a + a

Combine like terms: 1a + a = 2a
-6 + 2a = -9 + -1a + a

Combine like terms: -1a + a = 0
-6 + 2a = -9 + 0
-6 + 2a = -9

Add '6' to each side of the equation.
-6 + 6 + 2a = -9 + 6

Combine like terms: -6 + 6 = 0
0 + 2a = -9 + 6
2a = -9 + 6

Combine like terms: -9 + 6 = -3
2a = -3

Divide each side by '2'.
a = -1.5

Simplifying
a = -1.5