Determine o valor de x nas proporções a seguir
a) 2/15 = 3/2x

b) 9/4 = x+2/x+3

c)x+5/x = 10/8

d) 3x/21 = 5/7

e) 2x-1/x+2 = 3/5

f) x-5/3 = x-1/4

Step-by-step explanation:

a) Given the proportion:

You must solve for "x":

b) Given:

Solve for "x":

c)

Solve for "x":

d)

Solve for "x":

e)

Solve for "x":

f)

Solve for "x":

b. 13

step-by-step explanation:

as there are 13 students in bowling class therefore the most reasonable answer is b as only 13 students are in the bowling class.

46

step-by-step explanation:

given

height = 168 cm

formula

height =2.47*f+54.13

solution

168 = 2.47f + 54.13             subtract 54.13 from both sides

168 - 54.13   = 2.47f             combine

113.87 = 2.47f                     divide by 2.47

113.87 / 2.47 = f                   combine

46.1 = f  

answer: 46 cm