a) -x- -3/4 = -8/11 b) 11/12 – ( 2/5 + x ) = 2/3 c) 1/3 + 1/2 : x = -4 31/07/2021 Bởi Caroline a) -x- -3/4 = -8/11 b) 11/12 – ( 2/5 + x ) = 2/3 c) 1/3 + 1/2 : x = -4
Đáp án: Giải thích các bước giải: `a) -x- -3/4 = -8/11 ``<=>-x+3/4=-8/11``<=>-x=-8/11-3/4=-65/44``=>x=65/44``b) 11/12 – ( 2/5 + x ) = 2/3``<=>11/12-2/5-x=2/3``=>31/60-x=2/3``=>x=31/60-2/3=-3/20``c) 1/3 + 1/2 : x = -4` ` <=>1/2:x=-4-1/3=-13/3``=>x=1/2:-13/3=-3/26` Bình luận
a) -x-3/4=-8/11 <=> -$\frac{44x+33}{44}$ =-$\frac{32}{44}$ <=> 44x+33=32 <=> 44x=-1 <=> x=-$\frac{1}{44}$ b) $\frac{11}{12}$ – ($\frac{2}{5}$ +x)=$\frac{2}{3}$ <=> $\frac{55}{60}$ – $\frac{24}{60}$ – $\frac{60x}{60}$ = $\frac{40}{60}$ <=>- $\frac{3}{20}$ = $\frac{20x}{20}$ <=> 3=20x <=> x=$\frac{3}{20}$ Bình luận
Đáp án:
Giải thích các bước giải:
`a) -x- -3/4 = -8/11 `
`<=>-x+3/4=-8/11`
`<=>-x=-8/11-3/4=-65/44`
`=>x=65/44`
`b) 11/12 – ( 2/5 + x ) = 2/3`
`<=>11/12-2/5-x=2/3`
`=>31/60-x=2/3`
`=>x=31/60-2/3=-3/20`
`c) 1/3 + 1/2 : x = -4`
` <=>1/2:x=-4-1/3=-13/3`
`=>x=1/2:-13/3=-3/26`
a) -x-3/4=-8/11 <=> -$\frac{44x+33}{44}$ =-$\frac{32}{44}$
<=> 44x+33=32 <=> 44x=-1 <=> x=-$\frac{1}{44}$
b) $\frac{11}{12}$ – ($\frac{2}{5}$ +x)=$\frac{2}{3}$
<=> $\frac{55}{60}$ – $\frac{24}{60}$ – $\frac{60x}{60}$ = $\frac{40}{60}$
<=>- $\frac{3}{20}$ = $\frac{20x}{20}$ <=> 3=20x <=> x=$\frac{3}{20}$