Question

tìm x biết    a,    |2x - 1| = 5x,    ( 5x - 1).3 - 2 = 70 ;

giúp tôi với mọi người ơi

 

Answer 1

(5x-1)3-2=70

<=>(5x-1).3=70+2=72

<=>5x-1=72:3

<=>5x-1=24

<=>5x=24+1=25

<=>5x=25:5=5

Answer 2

de vay sao ban k lam

2x-1=5x

2x-1= -5x

tu lam tiep

Answer 3

l2x-1l=5x

TH1: 2x-1=5x <=> 2x-5x=1<=>-3x=1<=>x=-1/3

TH2:2x-1=-5x<=>2x+5x=1<=>7x=1<=>x=1/7