3(z+3)=18

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Solution for 3(z+3)=18 equation: 


Simplifying
3(z + 3) = 18

Reorder the terms:
3(3 + z) = 18
(3 * 3 + z * 3) = 18
(9 + 3z) = 18

Solving
9 + 3z = 18

Solving for variable 'z'.

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

Add '-9' to each side of the equation.
9 + -9 + 3z = 18 + -9

Combine like terms: 9 + -9 = 0
0 + 3z = 18 + -9
3z = 18 + -9

Combine like terms: 18 + -9 = 9
3z = 9

Divide each side by '3'.
z = 3

Simplifying
z = 3

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