2/3-x=5/4 Help Meeeeeeeeee -5/9+-5/9 : (5/3-25/12) Help meeeeeeeeeeeee 22/08/2021 Bởi Autumn 2/3-x=5/4 Help Meeeeeeeeee -5/9+-5/9 : (5/3-25/12) Help meeeeeeeeeeeee
Đáp án: x = $\frac{-7}{12}$ $\frac{-5}{9}$ + $\frac{-5}{9}$ : ($\frac{5}{3}$ – $\frac{25}{12}$ ) = $\frac{7}{9}$ Giải thích các bước giải: + / $\frac{2}{3}$ – x = $\frac{5}{4}$ x = $\frac{2}{3}$ – $\frac{5}{4}$ x = $\frac{8-15}{3.4}$ x = $\frac{-7}{12}$ + / $\frac{-5}{9}$ + $\frac{-5}{9}$ : ($\frac{5}{3}$ – $\frac{25}{12}$ ) = $\frac{-5}{9}$ + $\frac{-5}{9}$ : $\frac{60-75}{3.12}$ = $\frac{-5}{9}$ + $\frac{-5}{9}$ : $\frac{-5}{12}$ = $\frac{-5}{9}$ + $\frac{-5}{9}$ . $\frac{12}{-5}$ = $\frac{-5}{9}$ + $\frac{4}{3}$ = $\frac{-15+36}{9.3}$ = $\frac{7}{9}$ Bình luận
`a, 2/3 – x = 5/4` `⇒ x = 2/3 – 5/4` `⇒ x = 8/12 – 15/12` `⇒ x = (-7)/12` `b, (-5)/9 + (-5)/9 : (5/3 – 25/12)` `= (-5)/9 + (-5)/9 : (20/12 – 25/12)` `= (-5)/9 + (-5)/9 : (-5)/12` `= (-5)/9 + (-5)/9 . (-12)/5` `= (-5)/9 + 12/9` `= 7/9` Bình luận
Đáp án: x = $\frac{-7}{12}$
$\frac{-5}{9}$ + $\frac{-5}{9}$ : ($\frac{5}{3}$ – $\frac{25}{12}$ ) = $\frac{7}{9}$
Giải thích các bước giải:
+ / $\frac{2}{3}$ – x = $\frac{5}{4}$
x = $\frac{2}{3}$ – $\frac{5}{4}$
x = $\frac{8-15}{3.4}$
x = $\frac{-7}{12}$
+ / $\frac{-5}{9}$ + $\frac{-5}{9}$ : ($\frac{5}{3}$ – $\frac{25}{12}$ )
= $\frac{-5}{9}$ + $\frac{-5}{9}$ : $\frac{60-75}{3.12}$
= $\frac{-5}{9}$ + $\frac{-5}{9}$ : $\frac{-5}{12}$
= $\frac{-5}{9}$ + $\frac{-5}{9}$ . $\frac{12}{-5}$
= $\frac{-5}{9}$ + $\frac{4}{3}$
= $\frac{-15+36}{9.3}$
= $\frac{7}{9}$
`a, 2/3 – x = 5/4`
`⇒ x = 2/3 – 5/4`
`⇒ x = 8/12 – 15/12`
`⇒ x = (-7)/12`
`b, (-5)/9 + (-5)/9 : (5/3 – 25/12)`
`= (-5)/9 + (-5)/9 : (20/12 – 25/12)`
`= (-5)/9 + (-5)/9 : (-5)/12`
`= (-5)/9 + (-5)/9 . (-12)/5`
`= (-5)/9 + 12/9`
`= 7/9`