9(z+9)-(-7z-2)=15z

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Solution for 9(z+9)-(-7z-2)=15z equation:


Simplifying
9(z + 9) + -1(-7z + -2) = 15z

Reorder the terms:
9(9 + z) + -1(-7z + -2) = 15z
(9 * 9 + z * 9) + -1(-7z + -2) = 15z
(81 + 9z) + -1(-7z + -2) = 15z

Reorder the terms:
81 + 9z + -1(-2 + -7z) = 15z
81 + 9z + (-2 * -1 + -7z * -1) = 15z
81 + 9z + (2 + 7z) = 15z

Reorder the terms:
81 + 2 + 9z + 7z = 15z

Combine like terms: 81 + 2 = 83
83 + 9z + 7z = 15z

Combine like terms: 9z + 7z = 16z
83 + 16z = 15z

Solving
83 + 16z = 15z

Solving for variable 'z'.

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

Add '-15z' to each side of the equation.
83 + 16z + -15z = 15z + -15z

Combine like terms: 16z + -15z = 1z
83 + 1z = 15z + -15z

Combine like terms: 15z + -15z = 0
83 + 1z = 0

Add '-83' to each side of the equation.
83 + -83 + 1z = 0 + -83

Combine like terms: 83 + -83 = 0
0 + 1z = 0 + -83
1z = 0 + -83

Combine like terms: 0 + -83 = -83
1z = -83

Divide each side by '1'.
z = -83

Simplifying
z = -83

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