4-2z=9

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Solution for 4-2z=9 equation: 


Simplifying
4 + -2z = 9

Solving
4 + -2z = 9

Solving for variable 'z'.

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

Add '-4' to each side of the equation.
4 + -4 + -2z = 9 + -4

Combine like terms: 4 + -4 = 0
0 + -2z = 9 + -4
-2z = 9 + -4

Combine like terms: 9 + -4 = 5
-2z = 5

Divide each side by '-2'.
z = -2.5

Simplifying
z = -2.5

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