Question

Answer 1

1:

a: 2x-3=5

=>2x=8

=>x=4

b: (x+2)(3x-15)=0

=>x+2=0 hoặc 3x-15=0

=>x=5 hoặc x=-2

c: \(\dfrac{3}{x+1}-\dfrac{2}{x-2}=\dfrac{4x-2}{\left(x+1\right)\left(x-2\right)}\)

=>\(\dfrac{3x-6-2x-2}{\left(x+1\right)\left(x-2\right)}=\dfrac{4x-2}{\left(x+1\right)\left(x-2\right)}\)

=>4x-2=x-8

=>3x=-6

=>x=-2(nhận)

a: =>2/3x+2/3<2+1/2x-1

=>2/3x+2/3<1/2x+1

=>2/3x-1/2x<1/3

=>1/6x<1/3

=>x<1/3:1/6=2

b: 3x-4<5x-6

=>-2x<-2

=>x>1