2,5x + \(\dfrac{4}{7}=-1,5\)
\(\Leftrightarrow2,5x=-\dfrac{29}{14}\)
\(\Leftrightarrow x=-\dfrac{29}{35}\)
`<=> 2,5x = -3/2 - 4/7`
`<=> 5/2x = -29/14`
`<=> x = -29/14 : 5/2`
`<=> x = -29/35`
tính giá trị biểu thức A=1,5.|2,5x-3|-3,2.(x:0,25-4) với |x|=1,5
\(\dfrac{7,5+1,5+\dfrac{5}{4}+\dfrac{5}{11}}{10,5+2,1+\dfrac{7}{4}+\dfrac{7}{11}}\)+ x =\(\dfrac{6}{7}\)
tim x
\dfrac{5}{6}x-\dfrac{3}{4}=\dfrac{-1}{4}+\dfrac{2}{3}65x−43=4−1+32
-1\dfrac{1}{2}-\dfrac{2}{3}x=\dfrac{5}{6}-\left(\dfrac{-2}{5}\right)−121−32x=65−(5−2)
\left(\dfrac{4}{5}:x+1,5\right):\dfrac{2}{3}=-1,5(54:x+1,5):32=−1,5
\dfrac{4}{3}x-\dfrac{2}{3}=\dfrac{1}{4}-x34x−32=41−x
giup minh nhe minh dang can gap
\(\frac{1}{3}x+\frac{6}{7}-\frac{3}{4}x=-3\frac{1}{3}x-3,16+2,5x\)
Trong các cách viết sau cách viết nào cho ta phân số:
A. \(\dfrac{-3,15}{6}\) B.\(\dfrac{-1,5}{2,17}\) C.\(\dfrac{-5}{0}\) D.\(\dfrac{3}{-4}\)
Tìm số nguyên x biết
m) (x-4).(3-x)=0
n) 2.(x-5)+4=2
h)2,5x-8=2x+3
(1,5 - 25%) . \(2\dfrac{3}{4}\)
làm chi tiết nhé xin cảm ơn!!
Bài 3: Tính nhanh:
a) \(15\dfrac{3}{13}\)-\(\left(3\dfrac{4}{7}+8\dfrac{3}{13}\right)\)
b) \(\left(7\dfrac{4}{9}+4\dfrac{7}{11}\right)\)-\(3\dfrac{4}{9}\)
c) \(\dfrac{-7}{9}\).\(\dfrac{4}{11}\)+\(\dfrac{-7}{9}\).\(\dfrac{7}{11}\)+\(5\dfrac{7}{9}\)
d) 50%.\(1\dfrac{1}{3}\).10.\(\dfrac{7}{35}\).0,75
e) \(\dfrac{3}{1.4}\)+\(\dfrac{3}{4.7}\)+\(\dfrac{3}{7.10}\)+...+\(\dfrac{3}{40.43}\)
\(\dfrac{1}{\dfrac{2,5}{1,5}}\)
\(\dfrac{3}{4}.\dfrac{7}{9}.\dfrac{1}{9}.\dfrac{7}{4}\)
\(\dfrac{6}{7}.\dfrac{8}{13}-\dfrac{6}{9}.\dfrac{9}{7}+\dfrac{5}{13}.\dfrac{6}{7}\)
2.11.\(\dfrac{3}{4}.\dfrac{9}{121}\)
