3(9+z)=42

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Solution for 3(9+z)=42 equation: 


Simplifying
3(9 + z) = 42
(9 * 3 + z * 3) = 42
(27 + 3z) = 42

Solving
27 + 3z = 42

Solving for variable 'z'.

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

Add '-27' to each side of the equation.
27 + -27 + 3z = 42 + -27

Combine like terms: 27 + -27 = 0
0 + 3z = 42 + -27
3z = 42 + -27

Combine like terms: 42 + -27 = 15
3z = 15

Divide each side by '3'.
z = 5

Simplifying
z = 5

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