9z-[7z-(18z+3)]=0

Solution for 9z-[7z-(18z+3)]=0 equation:

Simplifying
9z + -1[7z + -1(18z + 3)] = 0

Reorder the terms:
9z + -1[7z + -1(3 + 18z)] = 0
9z + -1[7z + (3 * -1 + 18z * -1)] = 0
9z + -1[7z + (-3 + -18z)] = 0

Reorder the terms:
9z + -1[-3 + 7z + -18z] = 0

Combine like terms: 7z + -18z = -11z
9z + -1[-3 + -11z] = 0
9z + [-3 * -1 + -11z * -1] = 0
9z + [3 + 11z] = 0

Reorder the terms:
3 + 9z + 11z = 0

Combine like terms: 9z + 11z = 20z
3 + 20z = 0

Solving
3 + 20z = 0

Solving for variable 'z'.

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

Add '-3' to each side of the equation.
3 + -3 + 20z = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 20z = 0 + -3
20z = 0 + -3

Combine like terms: 0 + -3 = -3
20z = -3

Divide each side by '20'.
z = -0.15

Simplifying
z = -0.15