Đáp án + Giải thích các bước giải:
`a)` `x/5=2/3=>x=2/3*5=10/3`
Vậy `x=10/3`
`b)` `x/3 - 1/2 = 1/5` $\\$ `=> (10x)/30-15/30=6/30` $\\$ `=>(10x)/30=21/30` $\\$ `=> 10x = 21 => x = 21/10`
Vậy `x = 21/10`
`c)` `x/5 + 1/2=6/10` $\\$ `=> (2x)/10+5/10=6/10` $\\$ `=>(2x)/10=1/10` $\\$ `=> 2x = 1 => x = 1/2`
Vậy `x = 1/2`
`d)` giống câu `c)`
`e)` `(x + 3)/15=1/3` $\\$ `=>(x+3)/15=5/15` $\\$ `=>x+3=5=>x=2`
Vậy `x = 2`
`g)` `(x - 12)/4=1/2` $\\$ `=>(x-12)/4=2/4` $\\$ `=> x - 12 = 2 => x = 14`
Vậy `x = 14`
`h)` `4/5 + x = 2/3` $\\$ `=>x=2/3-4/5` $\\$ `=>x=10/15-12/15=-2/15`
Vậy `x=-2/15`
`k)` `3/4 - x = 1/3` $\\$ `=>x=3/4-1/3=9/12-4/12=5/12`
Vậy `x = 5/12`
`n)` `(-5)/6-x=2/3` $\\$ `=>x=(-5)/6-2/3` $\\$ `=>x=(-5)/6-4/6=-9/6=-3/2`
Vậy `x = -3/2`
`m)` `x - 5/9=(-2)/3=>x=(-2)/3+5/9` $\\$ `=>x=(-6)/9+5/9=-1/9`
Vậy `x = -1/9`
