Bài 1: Tìm x:
a) x - \(\frac{4}{5}=\frac{7}{10}-\frac{3}{4}\)
b)\(2\frac{1}{3}-x=\frac{-5}{9}+2x\)
c) \(\frac{x+3}{2016}+\frac{x+2}{2017}=\frac{x+1}{2018}+\frac{x}{2019}\)
d) \(\frac{1}{x\left(x+1\right)}+\frac{1}{\left(x+1\right)\left(x+2\right)}+\frac{1}{\left(x+2\right)\left(x+3\right)}-\frac{1}{x}=\frac{1}{2010}\)
-Mấy bạn giúp mik nha vì mik học thêm môn toán lớp 7?
bài 1: Tìm x, biết:
a) l\(^{x-\frac{1}{3}l=2\frac{1}{5}}\)
b) \(l+\frac{2}{5}l+\frac{1}{2}=3,5\)
c) l\(x+\frac{1}{4}l-\frac{3}{4}=5\%\)
1)Rút gọn
a) /x-3/+/x-5/ với(3<x<5)
b)/2x+1/-/2x+1/ với x>\(\frac{-1}{2}\)
Tìm x biết :
1) \(\frac{x+1}{15}\)+ \(\frac{x+2}{14}\)=\(\frac{x+3}{13}\)+\(\frac{x+4}{12}\)
2) \(\frac{x+1}{2012}\)+\(\frac{x+2}{2011}\)+\(\frac{x+3}{2010}\)=\(\frac{x+4}{2009}\)+\(\frac{x+5}{2008}\)+\(\frac{x+6}{2007}\)
3)\(\frac{x-2}{2013}\)+\(\frac{x-1}{2014}\)=\(\frac{x-3}{2012}\)+\(\frac{x-4}{2011}\)
4)\(\frac{x-3}{20}\)+\(\frac{x-2}{21}\)=\(\frac{x-1}{22}\)+\(\frac{x}{23}\)
5)\(\frac{x+1}{20}\)+\(\frac{x+2}{19}\)+\(\frac{x+3}{18}\)= -3
6) \(\frac{x-1}{91}\)+\(\frac{x-2}{90}\)+\(\frac{x-3}{89}\)+\(\frac{x-4}{88}\)= 5
Ai giúp mình vs...Cả đống bài tập mà chẳng biết làm gì hết
Ai làm giúp mình sẽ tick nhé
bài 1: Tính nhanh:
A= \(\frac{1}{3}\)- \(\frac{3}{4}\)- (\(\frac{-3}{5}\))+ \(\frac{1}{72}\)- \(\frac{2}{9}\)- \(\frac{1}{36}\)+ \(\frac{1}{15}\)
B= (3+ \(\frac{1}{2}\)- \(\frac{2}{3}\)) - (2- \(\frac{2}{3}\)+ \(\frac{5}{2}\))- (5- \(\frac{5}{2}\)+ \(\frac{4}{3}\))
bài 2: tìm các số nguyên x,y; biết:
\(\frac{x}{6}\)- \(\frac{1}{y}\)= \(\frac{1}{2}\)
bài 3:tính :
S1= \(\frac{3}{1.4}\)+ \(\frac{6}{4.10}\)+ \(\frac{9}{10.19}\)+ \(\frac{12}{19.31}\)+ \(\frac{15}{31.46}\)
S2= \(\frac{3}{1.5}\)+ \(\frac{3}{5.9}\)+ \(\frac{3}{9.13}\)+....+ \(\frac{3}{89.93}\)
MỌI NGƯỜI GIẢI NHANH GIÚP MÌNH VỚI. MÌNH ĐANG CẦN GẤP TRONG TRƯA NAY
1)Tính nhanh giá trị biểu thức
A=\(\frac{1}{3}-\frac{3}{4}-\left(\frac{-3}{5}\right)+\frac{1}{64}-\frac{2}{9}-\frac{1}{36}+\frac{1}{15}\)
B=\(\left(\frac{-1}{2}\right)-\left(\frac{-3}{5}\right)+\left(\frac{-1}{9}\right)+\frac{1}{131}-\left(\frac{-2}{7}\right)+\frac{4}{35}-\frac{7}{18}\)
\(A=\left(3-\frac{1}{4}+\frac{2}{3}\right)-\left(5+\frac{1}{3}-\frac{6}{5}\right)-\left(6-\frac{7}{4}+\frac{3}{2}\right)\)
BT2; Tính
a,\(\frac{3}{5}\)+\(\frac{-1}{3}\)
b,\(\frac{-2}{13}\)+\(\frac{-11}{26}\)
c,-2+\(\frac{-5}{8}\)
d,\(\frac{13}{30}\)-\(\frac{1}{5}\)
e,\(\frac{2}{21}\)-\(\frac{-1}{28}\)
Tìm x
\(\frac{x+4}{2000}+\frac{x+3}{2001}=\frac{x+2}{2002}+\frac{x+1}{2003}\)