Question

mọi người ơii giúp tớ trước 16h chiều với ạ !! tớ cảm ơn mọi người nhiềuu

Answer 1

`a)-2/5+x=-1/3+3/4`

`-2/5+x=5/12`

`x=2/5+5/12`

`x=1/6`

`b)-2 2/3+5/3:x=1/3-0,75`

`-8/3+5/3:x=1/3-3/4`

`-8/3+5/3:x=-5/12`

`5/3:x=8/3-5/12`

`5/3:x=9/4`

`x=5/3:9/4`

`x=20/27`

`c)(2x+(-2)/3)(x-0,3)=0`

`2x+(-2)/3=0` hoặc `x-0,3=0`

`2x=2/3` hoặc `x=0,3`

`x=2/3:2` hoặc `x=0,3`

`x=1/3` hoặc `x=0,3`

`d)(x+2/3)^2=1/36`

`(x+2/3)^2=(+-1/6)^2`

`TH1:x+2/3=1/6`

`x=1/6-2/3`

`x=-1/2`

`TH2:x+2/3=-1/6`

`x=-1/6-2/3=-6/6`

`e)(2x-3/2)^3=27/8`

`(2x-3/2)^3=(3/2)^3`

`2x-3/2=3/2`

`2x=3/2+3/2`

`2x=3`

`x=3/2`