-1+3r=8

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Solution for -1+3r=8 equation:


Simplifying
-1 + 3r = 8

Solving
-1 + 3r = 8

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 + 3r = 8 + 1

Combine like terms: -1 + 1 = 0
0 + 3r = 8 + 1
3r = 8 + 1

Combine like terms: 8 + 1 = 9
3r = 9

Divide each side by '3'.
r = 3

Simplifying
r = 3

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