Question

As vrea cu tot cu rezolvare.
11,89•2,7=
18,45:3,2=
12,008+5,2-3,25+8=
12-x=9+2x=
3x-14=x+28=

Answer 1

11,89 * 2,7 = 1189/100 * 27/10 = 32103/1000 = 32,103

18,45 : 3,2 = 1845/100 : 32/10 = 1845/100 x 10/32 = 1845/10 x 1/32 = 369/2 x 1/32 = 369/64 = 5,765625

12.008 + 5,2 -3,25 + 8 = 12008/1000 + 52/10 - 325/100 + 8 = 12008/1000 + 5200/1000 - 3250/1000 + 8000/1000 = (12008+5200-3250+8000)/1000 = 21958/1000 = 21,958

12 - x = 9+2x
2x + x = 12 - 9
3x = 3
x = 1

3x - 14 = x + 28
3x - x = 28 + 14
2x = 42
x = 21