\(x\times\dfrac{1}{2}+x\times\dfrac{3}{4}=\dfrac{7}{8}\\ x\times\left(\dfrac{1}{2}+\dfrac{3}{4}\right)=\dfrac{7}{8}\)
\(x\times\dfrac{10}{8}=\dfrac{7}{8}\\ x=\dfrac{7}{8}:\dfrac{10}{8}\\ x=\dfrac{7}{10}\)
\(x\times\dfrac{1}{2}+x\times\dfrac{3}{4}=\dfrac{7}{8}\\ x\times\left(\dfrac{1}{2}+\dfrac{3}{4}\right)=\dfrac{7}{8}\)
\(x\times\dfrac{10}{8}=\dfrac{7}{8}\\ x=\dfrac{7}{8}:\dfrac{10}{8}\\ x=\dfrac{7}{10}\)
\(\dfrac{-4}{11}\times\dfrac{7}{15}-\dfrac{4}{15}\times\dfrac{8}{11}+\dfrac{-5}{11}\)
\(2\dfrac{2}{3}-2\dfrac{3}{5}\times\dfrac{10}{7}-\dfrac{7}{5}\)
các bạn làm trong hôm nay dùm mình nhé, cảm ơn
tìm x,y thuộc z
a. \(\dfrac{-1}{4}:\dfrac{-3}{4}+\dfrac{1}{2}< x< \dfrac{7}{8}-\dfrac{1}{2}:\dfrac{-5}{6}\)
Tìm \(x\)
1. \(\dfrac{1}{7}=\dfrac{8}{-x}\)
2. \(\dfrac{3x}{9}=\dfrac{2}{6}\)
3. \(4\dfrac{2}{5}:\left(\dfrac{-33}{10}\right)+x=-1\dfrac{5}{6}\)
4. \(45\%.x-2\dfrac{3}{8}=-1\dfrac{31}{40}\)
5. \(\left(x-2\dfrac{1}{4}\right):\left(-\dfrac{5}{6}\right)=3\)
Tìm x biết :\(\dfrac{2x-5}{6}=\dfrac{x-7}{5}\)
\(\dfrac{4x+1}{3}=\dfrac{2x-3}{4}\)
2. tìm x
a. \(\dfrac{x}{8}\)=\(\dfrac{-9}{6}\)
b. \(\dfrac{4}{9}\)+\(\dfrac{7}{3}\):x=\(\dfrac{1}{5}\)
c. \(\dfrac{-5}{9}\)- x=\(\dfrac{4}{3}\)
d. x +\(\dfrac{4}{17}\)=\(\dfrac{2}{34}\)
e. \(\dfrac{3}{4}\).x=\(\dfrac{7}{8}\)
f. \(5\dfrac{4}{7}\): x=11
a)thực hiện phép tính
A=[\(\dfrac{12-\dfrac{12}{7}-\dfrac{12}{289}-\dfrac{12}{85}}{4-\dfrac{4}{7}-\dfrac{4}{289}-\dfrac{4}{85}}\):\(\dfrac{5+\dfrac{5}{13}+\dfrac{5}{169}+\dfrac{5}{91}}{6+\dfrac{6}{13}+\dfrac{6}{169}+61}\)].\(\dfrac{158158158}{711711711}\)
b)tìm x biết
\(-\dfrac{2}{3}\)(x-\(\dfrac{1}{4}\))=\(\dfrac{1}{3}\)(2x-1)
\(\dfrac{1}{5}\).2x+\(\dfrac{1}{3}\).2x+1=\(\dfrac{1}{5}\).27+\(\dfrac{1}{3}\).28
c)tìm 2 số tự nhiên a và b biết tổng ƯCLN và BCNN của chúng là 15
d)tìm x nguyên thỏa mãn:/x+1/+/x-2/+/x+7/=5x-10
CÁC BN GIÚP MÌNH NHA MÌNH ĐANG CẦN GẤP
tính nhanh:
\(\dfrac{13}{4}\)x\(\dfrac{2}{3}\)x\(\dfrac{4}{13}\)x\(\dfrac{3}{2}\)=
giup mk nha
tìm x biết :
1.\(\dfrac{-5}{6}+\dfrac{8}{3}+\dfrac{-29}{6}\le x\le\dfrac{-1}{2}+2+\dfrac{5}{2}\)
2.\(\left(2,7x-1\dfrac{1}{2}x\right):\dfrac{2}{7}=\dfrac{-21}{4}\)
3.\(\left|2x-\dfrac{3}{4}\right|=1\)
làm hộ mik 3 con này cái
(1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 0)*( 9 - 8 + 7 - 6 + 5 - 4 - 3 + 2 - 1)*( 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 ×9)*(1-1+2-2+3+4-7)=?
Tính nhanh
Các bạn viết luôn kết quả cho mình nha😂😂😂😂😂😂😂😂