Các câu hỏi tương tự
\(\dfrac{29-x}{21}\)+\(\dfrac{27-x}{23}\)+\(\dfrac{25-x}{25}\)+\(\dfrac{23-x}{27}\)+\(\dfrac{21-x}{29}\)=\(\dfrac{(29-x+1}{21}\)+\(\dfrac{(27-x+1)}{23}\)+\(\dfrac{(25-x+1)}{25}\)+\(\dfrac{(23-x+1)}{21}\)=-5 +5
GIẢI nốt hộ mình với ạ
\(\frac{25}{49}\)x \(\frac{21}{29}\)-\(\frac{25}{49}\)x\(\frac{7}{29}\)+ \(\frac{24}{49}\)x\(\frac{15}{29}\)
Tìm x
a) \(\frac{x}{3}\)- \(\frac{10}{21}\)=\(\frac{-1}{7}\)
b) X - 25% = 1/2
c) -5/6 + 8/3 + -29/6 \(\le\)x \(\le\)-1/2 + 2 +5/2
Tìm x biết:a) 29-x/21 + 27-x/23 + 25-x/25 + 23-x/27 + 21-x/29
b)x-10/30 + x-14/43 + x-5/95 + x-148/8 = 0
Tìm x :
\(\frac{5}{7}+x=\frac{29}{21}\)
\(\frac{15}{2}-x=\frac{21}{14}\)
\(S=\frac{1}{21}+\frac{1}{22}+\frac{1}{23}+\frac{1}{24}+\frac{1}{25}+\frac{1}{26}+\frac{1}{27}+\frac{1}{28}+\frac{1}{29}+\frac{1}{30}\)\(\frac{1}{30}\)
Hãy so sánh S với \(\frac{1}{3}\)
Tính giá trị của các biểu thức sau bằng cách tính nhanh nhất
a\ \(\frac{21}{25}\times\frac{11}{9}\times\frac{5}{7}\)
b\ \(\frac{5}{23}\times\frac{17}{26}+\frac{5}{23}\times\frac{9}{26}\)
c\ \((\frac{3}{29}-\frac{1}{5})\times\frac{29}{3}\)
a) (frac{3}{29}-frac{1}{5}) xfrac{29}{3}b) frac{16}{15}x frac{-5}{14}xfrac{54}{24}xfrac{56}{21}c) frac{37}{7}xfrac{8}{11}+frac{37}{7}xfrac{5}{11}-frac{37}{7}xfrac{2}{11}
Đọc tiếp
a) (\(\frac{3}{29}\)-\(\frac{1}{5}\)) x\(\frac{29}{3}\)
b) \(\frac{16}{15}\)x \(\frac{-5}{14}\)x\(\frac{54}{24}\)x\(\frac{56}{21}\)
c) \(\frac{37}{7}\)x\(\frac{8}{11}\)+\(\frac{37}{7}\)x\(\frac{5}{11}\)-\(\frac{37}{7}\)x\(\frac{2}{11}\)
tìm x
\(\frac{3}{x+5}=15\%\)
\(\frac{x}{3}-\frac{10}{21}=\frac{-1}{7}\)
x-25%x=\(\frac{1}{2}\)