SOLUTION: 240=1/2[4(x+2)](10+20)

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Question 390956: 240=1/2[4(x+2)](10+20)
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
240=1/2(4x+8)(30)
240=(2x+4)(30)
240=60x+120
60x=120
x=2