3r+5r=4r+20

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Solution for 3r+5r=4r+20 equation:


Simplifying
3r + 5r = 4r + 20

Combine like terms: 3r + 5r = 8r
8r = 4r + 20

Reorder the terms:
8r = 20 + 4r

Solving
8r = 20 + 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
8r + -4r = 20 + 4r + -4r

Combine like terms: 8r + -4r = 4r
4r = 20 + 4r + -4r

Combine like terms: 4r + -4r = 0
4r = 20 + 0
4r = 20

Divide each side by '4'.
r = 5

Simplifying
r = 5

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