5,2x + 5,2 . 3 phần 52 =30% (x – 5 phần 12) : 29 phần 9= -6 phần 29 30/10/2021 Bởi aihong 5,2x + 5,2 . 3 phần 52 =30% (x – 5 phần 12) : 29 phần 9= -6 phần 29
Đáp án: Giải thích các bước giải: `5,2x+(5,2).3/52=3/10` `5,2(x+1/4)=3/10` `=>x+1/4=3/10:26/5=3/52` `=>x=3/52-1/4=-5/26` `(x-5/12):29/9=6/29` `(x-5/12)=6/29.29/9=2/3` `=>x=2/3+5/12=13/12` Bình luận
1/ 5,2x + 5,2 . $\frac{3}{52}$ = 30% 5,2 . (x + $\frac{3}{52}$) = $\frac{30}{100}$ $\frac{52}{10}$ . (x + $\frac{3}{52}$) = $\frac{3}{10}$ x + $\frac{3}{52}$ = $\frac{3}{10}$ : $\frac{52}{10}$ x + $\frac{3}{52}$ = $\frac{3}{10}$ . $\frac{10}{52}$ x + $\frac{3}{52}$ = $\frac{3}{52}$ x = $\frac{3}{52}$ – $\frac{3}{52}$ x = 0 2/ (x – $\frac{5}{12}$) : $\frac{29}{9}$ = $\frac{-6}{29}$ x – $\frac{5}{12}$ = $\frac{-6}{29}$ . $\frac{29}{9}$ x – $\frac{5}{12}$ = $\frac{-2}{3}$ x = $\frac{-2}{3}$ + $\frac{5}{12}$ x = $\frac{-8}{12}$ + $\frac{5}{12}$ x = $\frac{-1}{4}$. Bình luận
Đáp án:
Giải thích các bước giải:
`5,2x+(5,2).3/52=3/10`
`5,2(x+1/4)=3/10`
`=>x+1/4=3/10:26/5=3/52`
`=>x=3/52-1/4=-5/26`
`(x-5/12):29/9=6/29`
`(x-5/12)=6/29.29/9=2/3`
`=>x=2/3+5/12=13/12`
1/ 5,2x + 5,2 . $\frac{3}{52}$ = 30%
5,2 . (x + $\frac{3}{52}$) = $\frac{30}{100}$
$\frac{52}{10}$ . (x + $\frac{3}{52}$) = $\frac{3}{10}$
x + $\frac{3}{52}$ = $\frac{3}{10}$ : $\frac{52}{10}$
x + $\frac{3}{52}$ = $\frac{3}{10}$ . $\frac{10}{52}$
x + $\frac{3}{52}$ = $\frac{3}{52}$
x = $\frac{3}{52}$ – $\frac{3}{52}$
x = 0
2/ (x – $\frac{5}{12}$) : $\frac{29}{9}$ = $\frac{-6}{29}$
x – $\frac{5}{12}$ = $\frac{-6}{29}$ . $\frac{29}{9}$
x – $\frac{5}{12}$ = $\frac{-2}{3}$
x = $\frac{-2}{3}$ + $\frac{5}{12}$
x = $\frac{-8}{12}$ + $\frac{5}{12}$
x = $\frac{-1}{4}$.