-(5a+6)-5(a-9)=

Solution for -(5a+6)-5(a-9)= equation:

Simplifying
-1(5a + 6) + -5(a + -9) = 0

Reorder the terms:
-1(6 + 5a) + -5(a + -9) = 0
(6 * -1 + 5a * -1) + -5(a + -9) = 0
(-6 + -5a) + -5(a + -9) = 0

Reorder the terms:
-6 + -5a + -5(-9 + a) = 0
-6 + -5a + (-9 * -5 + a * -5) = 0
-6 + -5a + (45 + -5a) = 0

Reorder the terms:
-6 + 45 + -5a + -5a = 0

Combine like terms: -6 + 45 = 39
39 + -5a + -5a = 0

Combine like terms: -5a + -5a = -10a
39 + -10a = 0

Solving
39 + -10a = 0

Solving for variable 'a'.

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

Add '-39' to each side of the equation.
39 + -39 + -10a = 0 + -39

Combine like terms: 39 + -39 = 0
0 + -10a = 0 + -39
-10a = 0 + -39

Combine like terms: 0 + -39 = -39
-10a = -39

Divide each side by '-10'.
a = 3.9

Simplifying
a = 3.9