Răspuns:
Explicație pas cu pas:
2/3 = x/12
2*12 = 3*x
24 = 3*x
x = 24 : 3 = 8
_____________
x/3 = 6/9
9*x = 3*6
9*x = 18
x = 18 : 9 = 2
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16/10 = x/5
5*16 = 10*x
80 = 10*x
x = 80 : 10 = 8
____________
x/4 = 3/2
2*x = 4*3
2*x = 12
x = 12 : 2 = 6
___________
x/10 = 2/5
5*x = 2*10
5*x = 20
x = 20 : 5 = 4