9z+9-7z=45-7z

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Solution for 9z+9-7z=45-7z equation:


Simplifying
9z + 9 + -7z = 45 + -7z

Reorder the terms:
9 + 9z + -7z = 45 + -7z

Combine like terms: 9z + -7z = 2z
9 + 2z = 45 + -7z

Solving
9 + 2z = 45 + -7z

Solving for variable 'z'.

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

Add '7z' to each side of the equation.
9 + 2z + 7z = 45 + -7z + 7z

Combine like terms: 2z + 7z = 9z
9 + 9z = 45 + -7z + 7z

Combine like terms: -7z + 7z = 0
9 + 9z = 45 + 0
9 + 9z = 45

Add '-9' to each side of the equation.
9 + -9 + 9z = 45 + -9

Combine like terms: 9 + -9 = 0
0 + 9z = 45 + -9
9z = 45 + -9

Combine like terms: 45 + -9 = 36
9z = 36

Divide each side by '9'.
z = 4

Simplifying
z = 4

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