3r-13=50

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Solution for 3r-13=50 equation: 


Simplifying
3r + -13 = 50

Reorder the terms:
-13 + 3r = 50

Solving
-13 + 3r = 50

Solving for variable 'r'.

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

Add '13' to each side of the equation.
-13 + 13 + 3r = 50 + 13

Combine like terms: -13 + 13 = 0
0 + 3r = 50 + 13
3r = 50 + 13

Combine like terms: 50 + 13 = 63
3r = 63

Divide each side by '3'.
r = 21

Simplifying
r = 21

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