Rodney, Roger and Ron can lift a combined weight of 239 pounds. Rodney can lift twice as much as Roger, and Roger can lift 7 pounds less than 4 times the amount that Ron can lift. How much can Rodney lift?
Please answer the following question by reasoning step-by-step.
146
Let x represent the amount that Ron can lift.

Roger: 4x - 7.

Rodney:2(4x - 7) = 8x - 14.

Total:x + 4x - 7 + 8x - 14 = 239.

13x - 21 = 239.

13x = 260.

x = 20.

Rodney:8(20) - 14 = 146 pounds.

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So, the answer is 146