Question

tìm x, biết:

Answer 1

<=>1/2-5/4+2x=1/4
<=> -3/4+2x=1/4
<=> 2x=1
<=> x=1/2
 

Answer 2

=>|2x-5/4|=1/4

=>2x-5/4=1/4 hoặc 2x-5/4=-1/4

=>2x=3/2 hoặc 2x=1

=>x=1/2 hoặc x=3/4