Calcular x na proporção:
(3x/5)/2+3/4= (2*2/5)/1/2+3/4
Vamos lá:
(3x/5)/2+3/4= (2*2/5)/1/2+3/4 ==>
(3x/10)+3/4= (4/5)/1/2+3/4 ==>
(3x/10)+3/4= (8/5)+3/4 ==>
(3x/10)= (8/5) ===>
3x = 80/5 ===>
3x = 16
x = 16/3
(3x/5)/2+3/4=(4/5)/(5/4)
3x/10+3/4=4/5*5/4
6x+15=1*20
6x=5
x=5/6
Comments
Vamos lá:
(3x/5)/2+3/4= (2*2/5)/1/2+3/4 ==>
(3x/10)+3/4= (4/5)/1/2+3/4 ==>
(3x/10)+3/4= (8/5)+3/4 ==>
(3x/10)= (8/5) ===>
3x = 80/5 ===>
3x = 16
x = 16/3
(3x/5)/2+3/4=(4/5)/(5/4)
3x/10+3/4=4/5*5/4
6x+15=1*20
6x=5
x=5/6