2+9z-7z=

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Solution for 2+9z-7z= equation: 


Simplifying
2 + 9z + -7z = 0

Combine like terms: 9z + -7z = 2z
2 + 2z = 0

Solving
2 + 2z = 0

Solving for variable 'z'.

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

Add '-2' to each side of the equation.
2 + -2 + 2z = 0 + -2

Combine like terms: 2 + -2 = 0
0 + 2z = 0 + -2
2z = 0 + -2

Combine like terms: 0 + -2 = -2
2z = -2

Divide each side by '2'.
z = -1

Simplifying
z = -1

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