Question

Calcule as proporções abaixo usando a regra de três:

A) x-4/x+6=9/24
B) 35/X+8=21/3X
C)5X/X+1=1/2

Answer 1

A) x-4/X+6=9/24
X+4.24=6x.9
4x-6x=9-24
-2x=-15(-1)
2x=15
X=15/2
X=7,5

B)35x/X+8=21/3x
X+8.21=35.3x
8x.21=35.3x
8x+3x=35+21
11x=56/11
X=5,09

C)5x/X+1=1/2
1x.1=5x.2
X-5x=2-1
-4x=1
X=1/4
X=4 ou X=0,25