Toán 5B. Tìm x a) /x/=1/5 + 3/4 b) /x-5/=- -5/3 + 1/4 09/10/2021 By Melody 5B. Tìm x a) /x/=1/5 + 3/4 b) /x-5/=- -5/3 + 1/4
a,/x/=$\frac{1}{5}$+$\frac{3}{4}$<=>/x/=$\frac{14}{20}$+$\frac{15}{20}$<=>/x/=$\frac{19}{20}$ =>\(\left[ \begin{array}{l}x=\frac{19}{20}\\x=-\frac{19}{20}\end{array} \right.\) vậy x=$\frac{19}{20}$ hoặc x=-$\frac{19}{20}$ b, /x-5/=-(-$\frac{5}{3}$)+$\frac{1}{4}$ <=>/x+5/=$\frac{20}{12}$+$\frac{3}{12}$<=>/x=5/=$\frac{23}{12}$=>\(\left[ \begin{array}{l}x-5=\frac{23}{12}\\x-5=-\frac{23}{12}\end{array} \right.\) <=>\(\left[ \begin{array}{l}x=\frac{83}{12}\\x=\frac{37}{12}\end{array} \right.\) Vậy x=$\frac{83}{12}$ hoặc x=$\frac{37}{12}$ #xin 5 sao+ ctlhn Trả lời
$\color{red}{\text{Đáp án + Lời giải}}$ `a) |x|=1/5+3/4` `→|x|=19/20` `⇒ x = 19/20` `x = -19/20` Vậy ` x = 19/20` hoặc `x=-19/20` =============== `b) |x-5|=-(-5/3)+1/4` `→ |x-5|= 23/12` `→ x-5 = 23/12` `→ x = 23/12 + 5` `→ x = 83/12` hoặc `x-5 = -23/12` `→ x =-23/12+5` `→ x = 37/12` Vậy` x = 83/12` hoặc `x=37/12` =============== $\color{red}{\text{XIN HAY NHẤT AK}}$ Trả lời
a,/x/=$\frac{1}{5}$+$\frac{3}{4}$
<=>/x/=$\frac{14}{20}$+$\frac{15}{20}$
<=>/x/=$\frac{19}{20}$
=>\(\left[ \begin{array}{l}x=\frac{19}{20}\\x=-\frac{19}{20}\end{array} \right.\)
vậy x=$\frac{19}{20}$ hoặc x=-$\frac{19}{20}$
b, /x-5/=-(-$\frac{5}{3}$)+$\frac{1}{4}$
<=>/x+5/=$\frac{20}{12}$+$\frac{3}{12}$
<=>/x=5/=$\frac{23}{12}$
=>\(\left[ \begin{array}{l}x-5=\frac{23}{12}\\x-5=-\frac{23}{12}\end{array} \right.\)
<=>\(\left[ \begin{array}{l}x=\frac{83}{12}\\x=\frac{37}{12}\end{array} \right.\)
Vậy x=$\frac{83}{12}$ hoặc x=$\frac{37}{12}$
#xin 5 sao+ ctlhn
$\color{red}{\text{Đáp án + Lời giải}}$
`a) |x|=1/5+3/4`
`→|x|=19/20`
`⇒ x = 19/20`
`x = -19/20`
Vậy ` x = 19/20`
hoặc `x=-19/20`
===============
`b) |x-5|=-(-5/3)+1/4`
`→ |x-5|= 23/12`
`→ x-5 = 23/12`
`→ x = 23/12 + 5`
`→ x = 83/12`
hoặc `x-5 = -23/12`
`→ x =-23/12+5`
`→ x = 37/12`
Vậy` x = 83/12`
hoặc `x=37/12`
===============
$\color{red}{\text{XIN HAY NHẤT AK}}$