7[-((3-7)-3(5-8))]=x

Solution for 7[-((3-7)-3(5-8))]=x equation:

Simplifying
7[-1((3 + -7) + -3(5 + -8))] = x

Combine like terms: 3 + -7 = -4
7[-1((-4) + -3(5 + -8))] = x
7[-1(-4 + -3(5 + -8))] = x

Combine like terms: 5 + -8 = -3
7[-1(-4 + -3(-3))] = x

Multiply -3 * -3
7[-1(-4 + 9)] = x

Combine like terms: -4 + 9 = 5
7[-1(5)] = x

Multiply -1 * 5
7[-5] = x

Multiply 7 * -5
-35 = x

Solving
-35 = x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-35 + -1x = x + -1x

Combine like terms: x + -1x = 0
-35 + -1x = 0

Add '35' to each side of the equation.
-35 + 35 + -1x = 0 + 35

Combine like terms: -35 + 35 = 0
0 + -1x = 0 + 35
-1x = 0 + 35

Combine like terms: 0 + 35 = 35
-1x = 35

Divide each side by '-1'.
x = -35

Simplifying
x = -35