помогите пожалуйста!!!!!. Created by nastia330. matematika-ru

помогите пожалуйста!!!!!...

p1se4ka2006 11. 15:3*5=25
12. 10:2*7=35
14. 1:1*6=6
15. 10:1*5=50
Если неправильно говори!

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nastia330 правельно

D4rK4y0 11) 15 - 60%
х - 100%
15/x = 60/100
1500 = 60x
x = 1500/60
x = 25

12)10 - 2/7
x - 1
10/x = 2/7
2/7x = 10
x = 10/ 2/7
x = 35

14) 1 - 1/6
x - 1
1/x = 1/6
1/6x = 1
x = 6

15) 10 - 0.2
x - 1
10/x=0.2
0.2x = 10
x = 50

0 votes Thanks 1

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