5r-1=99

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Solution for 5r-1=99 equation: 


Simplifying
5r + -1 = 99

Reorder the terms:
-1 + 5r = 99

Solving
-1 + 5r = 99

Solving for variable 'r'.

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

Add '1' to each side of the equation.
-1 + 1 + 5r = 99 + 1

Combine like terms: -1 + 1 = 0
0 + 5r = 99 + 1
5r = 99 + 1

Combine like terms: 99 + 1 = 100
5r = 100

Divide each side by '5'.
r = 20

Simplifying
r = 20

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