2r+5=-r+20

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Solution for 2r+5=-r+20 equation:


Simplifying
2r + 5 = -1r + 20

Reorder the terms:
5 + 2r = -1r + 20

Reorder the terms:
5 + 2r = 20 + -1r

Solving
5 + 2r = 20 + -1r

Solving for variable 'r'.

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

Add 'r' to each side of the equation.
5 + 2r + r = 20 + -1r + r

Combine like terms: 2r + r = 3r
5 + 3r = 20 + -1r + r

Combine like terms: -1r + r = 0
5 + 3r = 20 + 0
5 + 3r = 20

Add '-5' to each side of the equation.
5 + -5 + 3r = 20 + -5

Combine like terms: 5 + -5 = 0
0 + 3r = 20 + -5
3r = 20 + -5

Combine like terms: 20 + -5 = 15
3r = 15

Divide each side by '3'.
r = 5

Simplifying
r = 5

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