question in description! !! I need help!!!

Question

a load of bricks is twice as heavy as a load of sticks. the total weight of 4 loads of bricks and four load of sticks is 771 kilograms. what is the total weight of one load of bricks and three loads of sticks? 

Answer 1

We want to write an algebraic number sentence that relates these two weights using only one variable:

Sticks weight = S

Bricks weight = 2S

 Now use those definitions to write an equation that describes the situation given:

4(2S) + 4S = 771 

 

8S + 4S = 771 

12S = 771 

S = 64.25

Bricks weigh twice this much = 128.5 

 

So now we multiply those weights by the new quantities: 

128.5 (1) + 3(64.25) = 321.25 Kg