10-[2-(5a+3)-4a]=

Solution for 10-[2-(5a+3)-4a]= equation:

Simplifying
10 + -1[2 + -1(5a + 3) + -4a] = 0

Reorder the terms:
10 + -1[2 + -1(3 + 5a) + -4a] = 0
10 + -1[2 + (3 * -1 + 5a * -1) + -4a] = 0
10 + -1[2 + (-3 + -5a) + -4a] = 0

Combine like terms: 2 + -3 = -1
10 + -1[-1 + -5a + -4a] = 0

Combine like terms: -5a + -4a = -9a
10 + -1[-1 + -9a] = 0
10 + [-1 * -1 + -9a * -1] = 0
10 + [1 + 9a] = 0

Combine like terms: 10 + 1 = 11
11 + 9a = 0

Solving
11 + 9a = 0

Solving for variable 'a'.

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

Add '-11' to each side of the equation.
11 + -11 + 9a = 0 + -11

Combine like terms: 11 + -11 = 0
0 + 9a = 0 + -11
9a = 0 + -11

Combine like terms: 0 + -11 = -11
9a = -11

Divide each side by '9'.
a = -1.222222222

Simplifying
a = -1.222222222