Question

Utilizand proportiile derivate,determinati numarul rational x din proportiile:

a)x/x+5=4/9:
b)x/x+11=-3/11;
c)4+x/x=9/2;
d)x/5=-x+6/-7;
e|)8/x=15/23+x;
f)x+7/4x=1/1,2;
g)14-x/x=60-2x/14+2x;
h)2x/7+2x=4x+1/4x+2,5;
i)bara deasupra lui x4/4x=4/7;
Va rog frumos!

Answer 1

.......................................