-18=9+4(z-7)

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Solution for -18=9+4(z-7) equation:


Simplifying
-18 = 9 + 4(z + -7)

Reorder the terms:
-18 = 9 + 4(-7 + z)
-18 = 9 + (-7 * 4 + z * 4)
-18 = 9 + (-28 + 4z)

Combine like terms: 9 + -28 = -19
-18 = -19 + 4z

Solving
-18 = -19 + 4z

Solving for variable 'z'.

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

Add '-4z' to each side of the equation.
-18 + -4z = -19 + 4z + -4z

Combine like terms: 4z + -4z = 0
-18 + -4z = -19 + 0
-18 + -4z = -19

Add '18' to each side of the equation.
-18 + 18 + -4z = -19 + 18

Combine like terms: -18 + 18 = 0
0 + -4z = -19 + 18
-4z = -19 + 18

Combine like terms: -19 + 18 = -1
-4z = -1

Divide each side by '-4'.
z = 0.25

Simplifying
z = 0.25

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