2(20+r+r)=300

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Solution for 2(20+r+r)=300 equation:


Simplifying
2(20 + r + r) = 300

Combine like terms: r + r = 2r
2(20 + 2r) = 300
(20 * 2 + 2r * 2) = 300
(40 + 4r) = 300

Solving
40 + 4r = 300

Solving for variable 'r'.

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

Add '-40' to each side of the equation.
40 + -40 + 4r = 300 + -40

Combine like terms: 40 + -40 = 0
0 + 4r = 300 + -40
4r = 300 + -40

Combine like terms: 300 + -40 = 260
4r = 260

Divide each side by '4'.
r = 65

Simplifying
r = 65

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