Question

13** Rezolvati in multimea numerelor rationale pozitive ecuatiile:
a) x-1=0,625+0,75x
b) 0,5x-1,4=3-1,7x

Answer 1

a)x-1=0,625+0,75x
x-0,75x=1+0,625
0,25x=1,625
x=1,625:0,25
x=6,5
S={6,5}
B)0,5x-1,4=3-1,7x
0,5x+1,7x=1,4+3
2,2x=4,4
x=4,4:2,2
x=2
S={2}