Question

решите уравнения 1)75/9=9/x 2)x/0,75=1,4/0,25 3)2,5/1,25=8/x 4)(3+1/3)/(2+2/9)=1,2/x

Answer 1

Ответ:

1)=75

2)=4,2

3)=4

4)=0,2

Пошаговое объяснение:

Answer 2

1)75/9=9/x;

x=9*9/75=(3*3*9)/(3*25)=27/25;

2)x/0,75=1,4/0,25;

x=(0.75*1.4)/0.25=4.2

3)2,5/1,25=8/x;

x=(8*1.25)/2.5=4

4)(3+1/3)/(2+2/9)=1,2/x;

(10/3)/(20/9)=(6/5)/x;

x=(20/9*6/5)/(10/3)=(3*20*6)/(9*5*10)=(3*2*10*3*2)/(3*3*5*10)=4/5