$\text{CÁC BẠN GHI PHÂN SỐ GIỐNG MÌNH KO GHI 3/6 , … NHA }$
$1)\frac{5}{13}+2x=$ $\frac{3}{13}$
$2)9:(2\frac{1}{5}+$ $\frac{3}{5}x)=$ $\frac{3}{4}$
$3)2\frac{2}{3}x-8$ $\frac{2}{3}=3$ $\frac{1}{3}$
$4)3\frac{1}{3}x+16$ $\frac{3}{4}=-13,25$
$5)(3\frac{1}{2}+2x)2$ $\frac{2}{3}=5$ $\frac{1}{3}$
$6)(\frac{3}{4}.x+2$ $\frac{1}{2}).$ $\frac{-2}{3}=$ $\frac{1}{8}$
$7)(2,4x-36):1\frac{5}{7}=-1$
1/
$\frac{5}{13}+2x=\frac{3}{13}$
$2x=\frac{3}{13}-\frac{5}{13}=\frac{-2}{13}$
$x=\frac{-1}{13}$
2/
$9:(\frac{11}{5}+\frac{3}{5}x)= \frac{3}{4}$
$\frac{11}{5}+\frac{3}{5}x= 9:\frac{3}{4}= 12$
$\frac{3}{5}x= \frac{49}{5}$
$x=\frac{49}{3}$
3/
$\frac{8}{3}x-\frac{26}{3}=\frac{10}{3}$
$\frac{8}{3}x= 12$
$x=12:\dfrac{8}{3}= \frac{9}{2}$
4/
$\frac{10}{3}x+\frac{67}{4}=-13,25$
$\frac{10}{3}x= -30$
$x= -30:\frac{10}{3}= -9$
5/
$(\frac{7}{2}+2x).\frac{8}{3}=\frac{16}{3}$
$\frac{7}{2}+2x= 2$
$2x= 2-\frac{7}{2}= -\frac{3}{2}$
$x=\frac{-3}{4}$
6/
$(\frac{3}{4}x+\frac{5}{2}).\frac{-2}{3}=\frac{1}{8}$
$\frac{3}{4}x+\frac{5}{2}=-\frac{3}{16}$
$\frac{3}{4}x= -\frac{43}{16}$
$x= -\frac{43}{12}$
7/
$(2,4x-36):\frac{12}{7}=-1$
$2,4x-36=-\frac{12}{7}$
$2,4x= \frac{240}{7}$
$x= \dfrac{100}{7}$
Đáp án:
Giải thích các bước giải:
`1)5/13+2x=3/13`
`=>2x=3/13-5/13`
`=>x=-2/13:2=-1/13`
`2)9:(2 1/5+3/5x)=3/4`
`=>11/5+3/5x=9:3/4=12`
`=>3/5x=12-11/5=49/5`
`=>x=49/5:3/5=49/3`
`3)2 2/3x-8 2/3=3 1/3`
`=>2 2/3x=3 1/3+8 2/3=12`
`=>x=12: 2 2/3=9/2`
`4)3 1/3x+16 3/4 =-13,25`
`=>3 1/3x=-13 1/4-16 3/4=-30`
`=>x=-30:3 1/3=-9`
`5)(3 1/2+2x)2 2/3=5 1/3`
`=>3 1/2+2x=5 1/3-2 2/3=2 2/3`
`=>x=2 2/3 :3 1/2=16/21`
Tương tự làm nốt !!!