7-3z-42=28

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Solution for 7-3z-42=28 equation:


Simplifying
7 + -3z + -42 = 28

Reorder the terms:
7 + -42 + -3z = 28

Combine like terms: 7 + -42 = -35
-35 + -3z = 28

Solving
-35 + -3z = 28

Solving for variable 'z'.

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

Add '35' to each side of the equation.
-35 + 35 + -3z = 28 + 35

Combine like terms: -35 + 35 = 0
0 + -3z = 28 + 35
-3z = 28 + 35

Combine like terms: 28 + 35 = 63
-3z = 63

Divide each side by '-3'.
z = -21

Simplifying
z = -21

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