Question

Rezolva ecuatia 2x-5,3=0,78 si aflati x numar natural, daca 3x+1<32,02

Answer 1

2x=5,3+0,78
2x=6,08
x=3,04
3x<31,02
x<10,34
$x\in\{0,1,...,8,9,10\}$

Answer 2

2x-5,3=0,78/+5,3
2x=6,08/:2
x=3,04
3x+1 <32,02
3×3,04+1 <32,03
9,12+1 <32,03
10,12 <32,03(A)