2(r+-130)+2r=1660

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Solution for 2(r+-130)+2r=1660 equation: 


Simplifying
2(r + -130) + 2r = 1660

Reorder the terms:
2(-130 + r) + 2r = 1660
(-130 * 2 + r * 2) + 2r = 1660
(-260 + 2r) + 2r = 1660

Combine like terms: 2r + 2r = 4r
-260 + 4r = 1660

Solving
-260 + 4r = 1660

Solving for variable 'r'.

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

Add '260' to each side of the equation.
-260 + 260 + 4r = 1660 + 260

Combine like terms: -260 + 260 = 0
0 + 4r = 1660 + 260
4r = 1660 + 260

Combine like terms: 1660 + 260 = 1920
4r = 1920

Divide each side by '4'.
r = 480

Simplifying
r = 480

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