2r+2(r+45)=570

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Solution for 2r+2(r+45)=570 equation:


Simplifying
2r + 2(r + 45) = 570

Reorder the terms:
2r + 2(45 + r) = 570
2r + (45 * 2 + r * 2) = 570
2r + (90 + 2r) = 570

Reorder the terms:
90 + 2r + 2r = 570

Combine like terms: 2r + 2r = 4r
90 + 4r = 570

Solving
90 + 4r = 570

Solving for variable 'r'.

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

Add '-90' to each side of the equation.
90 + -90 + 4r = 570 + -90

Combine like terms: 90 + -90 = 0
0 + 4r = 570 + -90
4r = 570 + -90

Combine like terms: 570 + -90 = 480
4r = 480

Divide each side by '4'.
r = 120

Simplifying
r = 120

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