Toán tìm x biết a , [ 3/4 . x + 2 1/2 ] . -2/3 = 1/8 11/09/2021 By Josephine tìm x biết a , [ 3/4 . x + 2 1/2 ] . -2/3 = 1/8
Đáp án: `x=(-43)/12` Giải thích các bước giải: `a)` `( 3/4 . x + 2(1)/2 ) . (-2)/3 = 1/8` `⇔( 3/4 . x + 5/2 ) . (-2)/3 = 1/8` `⇔ 3/4 . x + 5/2 = 1/8÷(-2)/3` `⇔3/4 . x + 5/2 = (-3)/16` `⇔3/4 . x = (-3)/16-5/2` `⇔3/4 . x = (-43)/16` `⇔x=(-43)/16÷3/4` `⇔x=(-43)/12` Trả lời
a) ($\frac{3}{4}$ . x + 2$\frac{1}{2}$) . $\frac{-2}{3}$ = $\frac{1}{8}$⇒($\frac{3}{4}$ . x + 2$\frac{1}{2}$) = $\frac{1}{8}$ : $\frac{-2}{3}$ ⇒$\frac{3}{4}$ . x + 2$\frac{1}{2}$) = $\frac{1}{8}$ . $\frac{-3}{2}$ ⇒($\frac{3}{4}$ . x + 2$\frac{1}{2}$) = $\frac{-3}{16}$⇒$\frac{3}{4}$ . x = $\frac{-3}{16}$ – 2$\frac{1}{2}$⇒$\frac{3}{4}$ . x = $\frac{-3}{16}$ – $\frac{5}{2}$⇒$\frac{3}{4}$ . x = $\frac{-3}{16}$-$\frac{40}{16}$ ⇒$\frac{3}{4}$ . x =$\frac{-43}{16}$ ⇒x = $\frac{-43}{16}$ : $\frac{3}{4}$ ⇒x = $\frac{-43}{16}$ . $\frac{4}{3}$ ⇒x = $\frac{-43.4}{16.3}$ ⇒x = $\frac{-43}{12}$ ~$LookWhatYouMadeMeDo_{}$~ Trả lời
Đáp án:
`x=(-43)/12`
Giải thích các bước giải:
`a)` `( 3/4 . x + 2(1)/2 ) . (-2)/3 = 1/8`
`⇔( 3/4 . x + 5/2 ) . (-2)/3 = 1/8`
`⇔ 3/4 . x + 5/2 = 1/8÷(-2)/3`
`⇔3/4 . x + 5/2 = (-3)/16`
`⇔3/4 . x = (-3)/16-5/2`
`⇔3/4 . x = (-43)/16`
`⇔x=(-43)/16÷3/4`
`⇔x=(-43)/12`
a) ($\frac{3}{4}$ . x + 2$\frac{1}{2}$) . $\frac{-2}{3}$ = $\frac{1}{8}$
⇒($\frac{3}{4}$ . x + 2$\frac{1}{2}$) = $\frac{1}{8}$ : $\frac{-2}{3}$
⇒$\frac{3}{4}$ . x + 2$\frac{1}{2}$) = $\frac{1}{8}$ . $\frac{-3}{2}$
⇒($\frac{3}{4}$ . x + 2$\frac{1}{2}$) = $\frac{-3}{16}$
⇒$\frac{3}{4}$ . x = $\frac{-3}{16}$ – 2$\frac{1}{2}$
⇒$\frac{3}{4}$ . x = $\frac{-3}{16}$ – $\frac{5}{2}$
⇒$\frac{3}{4}$ . x = $\frac{-3}{16}$-$\frac{40}{16}$
⇒$\frac{3}{4}$ . x =$\frac{-43}{16}$
⇒x = $\frac{-43}{16}$ : $\frac{3}{4}$
⇒x = $\frac{-43}{16}$ . $\frac{4}{3}$
⇒x = $\frac{-43.4}{16.3}$
⇒x = $\frac{-43}{12}$
~$LookWhatYouMadeMeDo_{}$~