Question

Determine o valor de x nas proporções abaixo:

a) x/4 = 5/2

b) x+5/7 = x+3/4

Answer 1

a) x/4= 5/2

2x= 4×5
x= 20/2
x= 10.

b) x+5/7= x+3/4

7(x+3)= 4(x+5)
7x+21= 4x+20
7x-4x= 20-21
3x= -1
x= -1/3.

Answer 2

A)

X/4= 5/2
2x = 20
X = 20/2
X = 10



B)

X + 5/7 = X + 3/4
5/7 = 3/4
X €ø