3z+rz=7

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Solution for 3z+rz=7 equation: 


Simplifying
3z + rz = 7

Reorder the terms:
rz + 3z = 7

Solving
rz + 3z = 7

Solving for variable 'r'.

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

Add '-3z' to each side of the equation.
rz + 3z + -3z = 7 + -3z

Combine like terms: 3z + -3z = 0
rz + 0 = 7 + -3z
rz = 7 + -3z

Divide each side by 'z'.
r = 7z-1 + -3

Simplifying
r = 7z-1 + -3

Reorder the terms:
r = -3 + 7z-1

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