SOLUTION: a set of childrens clocks contains three shapes: longs, flats, and cubes. there are 3 times as many longs as cubes, and 30 fewer flats than longs. if there are 600 blocks in all, h

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Question 99279: a set of childrens clocks contains three shapes: longs, flats, and cubes. there are 3 times as many longs as cubes, and 30 fewer flats than longs. if there are 600 blocks in all, how many longs are there?
how do i set up this equation?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
let c=cubes

there are 3 times as many longs as cubes ... 3c

30 fewer flats than longs ... 3c-30

if there are 600 blocks in all ... c+3c+3c-30=600 ... 7c=630 ... c=90

how many longs are there? ... 3(90)=270