18=9+2(z-8)

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Solution for 18=9+2(z-8) equation:


Simplifying
18 = 9 + 2(z + -8)

Reorder the terms:
18 = 9 + 2(-8 + z)
18 = 9 + (-8 * 2 + z * 2)
18 = 9 + (-16 + 2z)

Combine like terms: 9 + -16 = -7
18 = -7 + 2z

Solving
18 = -7 + 2z

Solving for variable 'z'.

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

Add '-2z' to each side of the equation.
18 + -2z = -7 + 2z + -2z

Combine like terms: 2z + -2z = 0
18 + -2z = -7 + 0
18 + -2z = -7

Add '-18' to each side of the equation.
18 + -18 + -2z = -7 + -18

Combine like terms: 18 + -18 = 0
0 + -2z = -7 + -18
-2z = -7 + -18

Combine like terms: -7 + -18 = -25
-2z = -25

Divide each side by '-2'.
z = 12.5

Simplifying
z = 12.5

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