VA ROG MULT LA MATE

Răspuns:
ex 6
a) x(x+3)/(x+3)=x.
b) (x+1)/2x
c) (x+3)/(x-3)=-1
ex 7:
a) 1/2
b) 7/21=1/3
c) 24xy/18z^3=4xy/3z^3
d) 27x/45y