Question

Calculati proportiile:
x/25=7/10
21/x=14/9
x/2,8=1,05/0,7
14/x=2,1/0,54
5x/4=13/2
1,2/7n=0,6/3,5

semnul / inseamna supra

Answer 1

1) 1/25 x 7/10 = x=35/2
2) x=27/2
3)x ori 0,7=1,05×2,8=0,7x=2,94=>x egal cu 4,2
4)x=3,6
5)5x ori 2 =13 ori 4=10x=52=>x egal cu 26/5
6)n=1