Question

Exercitiile 10 si 11 va rogg!!! Urgent! Dau coroana!

Answer 1

a:4:(3:b)=1:2
a:2:(3:b)=1
a:2=3:b
ab=6 deci a=1,b=6
a=2,b=3 și vice versa

a:15:(2:3b)=3:2
ab:10=3:2
ab=30 deci a=1,b=30
a=2,b=3
a=3,b=10 șamd

a:30:(5:6b)=1:5
ab:25=1:5
ab=5 deci a=1, b=5
a=5, b=1

2/3 x=4/27
2x=4/9
x=2/9

5 2/3 x=1.(8)
17/3x=17/9
x=1/3

0.(13)x=0.4(2)
13/99x=42-4/90 ] *10
13/11x=38/10
x=11*38/10*13=418/130


6/7x=5/42*12/13
6/7x=60/346
x=10/78

12/100x=14/10*6/9
12/100x=84/90
x=70/9