Giải các pt sau:
$a. x/2-2x /3+1/4=2/3$
$b. (x-2) /3-(2x-3) /4=x-1$
$c. x-5x/6+1/3=2-x/3$
$d. (5-2x) /3+1/2=2(x-1) -[3(x-1)]/6$
Tính hộ mấy chế. Tui nhác qué :(((
Giải các pt sau:
$a. x/2-2x /3+1/4=2/3$
$b. (x-2) /3-(2x-3) /4=x-1$
$c. x-5x/6+1/3=2-x/3$
$d. (5-2x) /3+1/2=2(x-1) -[3(x-1)]/6$
Tính hộ mấy chế. Tui nhác qué :(((
a) x/2 – 2x/3 +1/4 = 2/3
6x – 8x + 3 = 8
-2x =5
x =-2/5
b)(x-2)/3 – (2x-3)/4 = x-1
4x-8 – 6x +9 = 12x-12
4x-6x-12x =-12+8-9
-14x =-13
x =13/-14
c)x-5x/6 +1/3 = 2-x/3
x-5x + 2 = 4-2x
x+2x-5x =4-2
-2x =2
x =-1
d)(5-2x)/3 + 1/2 = 2(x-1) – [3(x-1)]/6
10-4x + 3 = 24x -24 – 3x -1
-4x +24x+3x=-24-1-10-3
23 x =-38
x =-38/23
Giải thích các bước giải:
`a,` `x/2-2x/3+1/4=2/3`
`6x-8x+3=8
`-2x+3=8`
`-2x=5
`x=-5/2`
`b, `(x-2)/3-(2x-3)/4=x-1`
`4(x-2)-3(2x-3)=12x-12`
`-2x+1=12x-12`
`-14x=-13`
`x=13/14`
c,`x-5x/6+1/3=2-x/3`
`6x-5x+2=12-2x`
`x+2=12-2x`
`3x=10`
`x=10/3`
d, `5x-2x/3+1/2=2(x-1)-[3(x-1)]/6
`2(5-2x)+3=12x-12(3x-3)`
`10-4x+3=12x-12-3x+3`
`-4x-9x=-12-10`
`-13x=-22`
`x=22/13`
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