T1
x+2/7,5=(19/3)/(1/3)
(x+2)/7,5=19/3:1/3
(x+2)/7,5=19/3·3/1
(x+2)/7,5=19
x+2=19·7,5
x+2=142,5
x=142,5-2
x=140,5
T2
a)2750·20/100=550
b)x·20/100=550
20x/100=550
20x=550·100
x=55000/20
x=2750
T3
15m³--------1000kg
25m³--------x
15/25=x/1000
x=(15·1000)/25
x=600kg
T4
x+y=153.400
{x,y}dp{6,4}
6x=4y=k
6x=k⇒x=k/6
4y=k⇒y=k/4
k/6+k/4=153.400
(2k+3k)/12=153.400
5k=153.400·12
5k=1.840.800
k=1.840.800/5
k=368.160
x=k/6=368.160/6
x=61360
y=k/4=368160/4
y=92040
61360+92040=153400
