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A load of bricks is twice as heavy as a load of sticks. The total weight of 4 loads of bricks and 4 loads of sticks is 771 kilograms. What is the total weight of 1 load of bricks and 3 loads of sticks? I need help answering.. I don't understand . Do I divide 4 into 771 and then divide 3 into 771?

Respuesta :

You have to divide the 4

The total weight of 1 load of bricks and 3 loads of sticks is. 385. 5 kilograms

let

the weight of a load of bricks = x

the weight of load of stick = y

A load of bricks is twice as heavy as a load of sticks. Therefore,

  • 2y = x

The total weight of 4 loads of bricks and 4 loads of sticks is 771 kilograms. Therefore,

  • 4x + 4y = 771
  • 4(2y) + 4y = 771
  • 12y = 771
  • y = 771 / 12 = 64.25

The total weight of 1 load of bricks and 3 loads of sticks can be calculated below

  • x + 3y
  • 2y + 3y = 6y
  • 6(64.25) = 385.5

Therefore, total weight of 1 load of bricks and 3 loads of sticks is. 385. 5 kilograms