.25r+.4r=660

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Solution for .25r+.4r=660 equation: 


Simplifying
0.25r + 0.4r = 660

Combine like terms: 0.25r + 0.4r = 0.65r
0.65r = 660

Solving
0.65r = 660

Solving for variable 'r'.

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

Divide each side by '0.65'.
r = 1015.384615

Simplifying
r = 1015.384615

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