7(3-z)=42

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Solution for 7(3-z)=42 equation: 


Simplifying
7(3 + -1z) = 42
(3 * 7 + -1z * 7) = 42
(21 + -7z) = 42

Solving
21 + -7z = 42

Solving for variable 'z'.

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

Add '-21' to each side of the equation.
21 + -21 + -7z = 42 + -21

Combine like terms: 21 + -21 = 0
0 + -7z = 42 + -21
-7z = 42 + -21

Combine like terms: 42 + -21 = 21
-7z = 21

Divide each side by '-7'.
z = -3

Simplifying
z = -3

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