3z+9-z=8+z+7

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Solution for 3z+9-z=8+z+7 equation:


Simplifying
3z + 9 + -1z = 8 + z + 7

Reorder the terms:
9 + 3z + -1z = 8 + z + 7

Combine like terms: 3z + -1z = 2z
9 + 2z = 8 + z + 7

Reorder the terms:
9 + 2z = 8 + 7 + z

Combine like terms: 8 + 7 = 15
9 + 2z = 15 + z

Solving
9 + 2z = 15 + z

Solving for variable 'z'.

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

Add '-1z' to each side of the equation.
9 + 2z + -1z = 15 + z + -1z

Combine like terms: 2z + -1z = 1z
9 + 1z = 15 + z + -1z

Combine like terms: z + -1z = 0
9 + 1z = 15 + 0
9 + 1z = 15

Add '-9' to each side of the equation.
9 + -9 + 1z = 15 + -9

Combine like terms: 9 + -9 = 0
0 + 1z = 15 + -9
1z = 15 + -9

Combine like terms: 15 + -9 = 6
1z = 6

Divide each side by '1'.
z = 6

Simplifying
z = 6

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