42=7(z+3)

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


Simplifying
42 = 7(z + 3)

Reorder the terms:
42 = 7(3 + z)
42 = (3 * 7 + z * 7)
42 = (21 + 7z)

Solving
42 = 21 + 7z

Solving for variable 'z'.

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

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

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

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

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

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

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

Simplifying
z = 3

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