7z+21=8

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Solution for 7z+21=8 equation: 


Simplifying
7z + 21 = 8

Reorder the terms:
21 + 7z = 8

Solving
21 + 7z = 8

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 = 8 + -21

Combine like terms: 21 + -21 = 0
0 + 7z = 8 + -21
7z = 8 + -21

Combine like terms: 8 + -21 = -13
7z = -13

Divide each side by '7'.
z = -1.857142857

Simplifying
z = -1.857142857

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