80=r+r

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Solution for 80=r+r equation:


Simplifying
80 = r + r

Combine like terms: r + r = 2r
80 = 2r

Solving
80 = 2r

Solving for variable 'r'.

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

Add '-2r' to each side of the equation.
80 + -2r = 2r + -2r

Combine like terms: 2r + -2r = 0
80 + -2r = 0

Add '-80' to each side of the equation.
80 + -80 + -2r = 0 + -80

Combine like terms: 80 + -80 = 0
0 + -2r = 0 + -80
-2r = 0 + -80

Combine like terms: 0 + -80 = -80
-2r = -80

Divide each side by '-2'.
r = 40

Simplifying
r = 40

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