Question

GIẢI CHI TIẾT GIÚP MÌNH NHA:

Answer 1

a: x>=5

=>|x-5|=x-5; |3-x|=|x-3|=x-3

|x-5|+|3-x|-3=15

=>|x-5|+|x-3|=18

=>x-5+x-3=18

=>2x-8=18

=>2x=26

=>x=13(nhận)

b: \(-5< =x< \dfrac{3}{2}\)

=>x+5>=0; x-3/2<0

=>\(\left|x+5\right|=x+5;\left|2x-3\right|=2\left|x-\dfrac{3}{2}\right|=2\left(\dfrac{3}{2}-x\right)\)

\(\left|2x-3\right|+\left|x+5\right|=3\)

=>\(2\left(\dfrac{3}{2}-x\right)+x+5=3\)

=>3-2x+x+5=3

=>8-x=3

=>x=5(loại)