92 teachers and students took part in a recycling exercise 3/4 of the participants were students the teachers broight an equal number of soda cans each all students broight the same number of empty soda cans each student boight 1/5 as many empty soda cans as each teacher the difference between the empty soda cans brought by the teachers and the students was 138 how many teachers took part in the recycling exercise, how many empty soda cans were collected all together how many soda cans did each student bring

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

b

2

−

b

b

3

+

7

b

2

+

14

b

+

6

%

−

3

b

3

+

7

b

2

+

14

b

+

6

%

step-by-step explanation:

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.