Question

Tìm x biết :

x + 4/5 = 4/5 + ( 3/7 + 3/5 )                     5/7 + x/35 = 4/5

x < 3/4 + 2                                2/3 + 1 < x < 5/6 + 4

x< 5/6 - 3/4                         2/3 < x < 2 - 5/6

 

 

Answer 1

a: =>x=3/7+3/5=15/35+21/35=36/35

b: =>x/35=4/5-5/7=28/35-25/35=3/35

=>x=3

c: =>x<3/4+8/4=11/4

=>\(x\in\left\{0;1;2;3\right\}\)

d: =>5/3<x<5/6+24/6=29/6

=>\(x\in\left\{2;3;4\right\}\)

e: =>x<10/12-9/12=1/12

=>x=0

f: =>2/3<x<12/6-5/6=7/6

=>x=1