1) a) x + 5/7 = 32/9 – ( -3/4) b) | x – 2/5 | = 1/3 13/10/2021 Bởi Jasmine 1) a) x + 5/7 = 32/9 – ( -3/4) b) | x – 2/5 | = 1/3
1) a) x + 5/7 = 32/9 – ( -3/4) x + 5/7 = 155/36 x= 155/36 – 5/7 x= 905/252 b) | x – 2/5 | = 1/3 TH1: x – 2/5 = 1/3 x = 1/3 + 2/5 x= 11/15 TH2 : x- 2/5 = -1/3 x = -1/3 + 2/5 x= 1/15 Vậy x = 905/ 252 x= 1/15 Chúc bn hc tốt !!! ???????? Bình luận
Bài 1: Tìm x. a) x + $\frac{5}{7}$ = $\frac{32}{9}$ – $\frac{-3}{4}$ x + $\frac{5}{7}$ = $\frac{155}{36}$ x = $\frac{155}{36}$ – $\frac{5}{7}$ x = $\frac{905}{252}$. b) | x – $\frac{2}{5}$ | = $\frac{1}{3}$ ⇒ x – $\frac{2}{5}$ = $\frac{1}{3}$ x = $\frac{1}{3}$ + $\frac{2}{5}$ x = $\frac{11}{15}$. ⇒ x – $\frac{2}{5}$ = $\frac{-1}{3}$ x = $\frac{-1}{3}$ + $\frac{2}{5}$ x = $\frac{1}{15}$. Vậy x = $\frac{11}{15}$ hay x = $\frac{1}{15}$. Bình luận
1) a) x + 5/7 = 32/9 – ( -3/4)
x + 5/7 = 155/36
x= 155/36 – 5/7
x= 905/252
b) | x – 2/5 | = 1/3
TH1: x – 2/5 = 1/3
x = 1/3 + 2/5
x= 11/15
TH2 : x- 2/5 = -1/3
x = -1/3 + 2/5
x= 1/15
Vậy x = 905/ 252
x= 1/15
Chúc bn hc tốt !!! ????????
Bài 1: Tìm x.
a) x + $\frac{5}{7}$ = $\frac{32}{9}$ – $\frac{-3}{4}$
x + $\frac{5}{7}$ = $\frac{155}{36}$
x = $\frac{155}{36}$ – $\frac{5}{7}$
x = $\frac{905}{252}$.
b) | x – $\frac{2}{5}$ | = $\frac{1}{3}$
⇒ x – $\frac{2}{5}$ = $\frac{1}{3}$
x = $\frac{1}{3}$ + $\frac{2}{5}$
x = $\frac{11}{15}$.
⇒ x – $\frac{2}{5}$ = $\frac{-1}{3}$
x = $\frac{-1}{3}$ + $\frac{2}{5}$
x = $\frac{1}{15}$.
Vậy x = $\frac{11}{15}$ hay x = $\frac{1}{15}$.