7z-1=8z-r

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Solution for 7z-1=8z-r equation:


Simplifying
7z + -1 = 8z + -1r

Reorder the terms:
-1 + 7z = 8z + -1r

Reorder the terms:
-1 + 7z = -1r + 8z

Solving
-1 + 7z = -1r + 8z

Solving for variable 'z'.

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

Add '-8z' to each side of the equation.
-1 + 7z + -8z = -1r + 8z + -8z

Combine like terms: 7z + -8z = -1z
-1 + -1z = -1r + 8z + -8z

Combine like terms: 8z + -8z = 0
-1 + -1z = -1r + 0
-1 + -1z = -1r

Add '1' to each side of the equation.
-1 + 1 + -1z = 1 + -1r

Combine like terms: -1 + 1 = 0
0 + -1z = 1 + -1r
-1z = 1 + -1r

Divide each side by '-1'.
z = -1 + r

Simplifying
z = -1 + r

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