math (please help)

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Timothy had a total of 238 blue and red marbles. He gave 3/7 of the blue marbles and 5/8 of the red marbles away. Altogether, Timothy gave away 124 marbles.How many red marbles did Timothy give away? (Skill: Equations)

  • math (please help) -

    number of blues ---- x
    number of reds ----- 238-x

    (3/7)x + (5/8)(238-x) = 124

    solve for x
    (I suggest multiplying each of the 3 terms by 56 , the LCD )

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