7(z-3)=42

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


Simplifying
7(z + -3) = 42

Reorder the terms:
7(-3 + z) = 42
(-3 * 7 + z * 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 = 63
7z = 63

Divide each side by '7'.
z = 9

Simplifying
z = 9

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