Question

Найдите решения двойных неравенств

Answer 1

2,15<$frac{3x-1}{4}$<2.6
2.15*4<$frac{4*(3x-1)}{4}$<2.6*4
8.6<3x-1<10.4
8.6+1<3x-1+1<10.4+1
9.6<3x<11.4
9.6:3<x<11.4:3
9 6/10:3<x<11 4/10:3
9 3/5:3<x<11 2/5:3
48/5:3<x<57/5:3
48/5*1/3<x<57/5*1/3
16/5<x<19/5
3 1/5<x<15 4/5
3.2<x<15.8

-1<$frac{3x-1}{4}$<2
-1*4<$frac{4*(3x-1)}{4}$<2*4
-4<3x-1<8
-4+1<3x-1+1<8+1
-3<3x<9
-3:3<x<9:3
-1<x<3