math (please help)
posted by widyan .
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)

number of blues  x
number of reds  238x
(3/7)x + (5/8)(238x) = 124
solve for x
(I suggest multiplying each of the 3 terms by 56 , the LCD )