Question

amplificati 3 urmatoarele fractii:1supra2 5supra7 a suprat b
2x supra 5y x+2 supra y+1 a+b supra x+y

Answer 1

1/3=3/9
5/7=15/21
a/b=3a/3b
2x/5y=6x/15y
(x+2)/(y+1)=3(x+2)/3(y+1)=(3x+6)/(3y+3)
(a+b)/(x+y)=(3a+3b)/ (3x+3y)