Algebra questions need help

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The large boxes weigh 40 pounds each, and the small boxes weigh 15 pounds each. There are 

 boxes in all. If the truck is carrying a total of 
 pounds in boxes, how many of each type of box is it carrying?

Large

small

Mar 28th, 2015

let x big box and y small boxs are there

x+y= 135 ; 40x+15y=3650

40x+15(135-x) = 3650 ; 40x  - 15x = 3650-2025

25 x  = 1625; x = 65 Box     ;   hence y = 135-65 =70

hence 65 big boxes and 70 small boxes are there in the truck


Mar 28th, 2015

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Mar 28th, 2015
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