h + p = 230 p = 6h plug p = 6h into the second h + 6h = 230 7h = 230 h = 230/7 p= 6(230/7) = 1380/7 into 1st 230/7 + f = 120 f = 120-230/7 = 610/7 h = 230/7 f = 610/7 p = 1380/7
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