Các câu hỏi tương tự
Tìm x biết
a) x+2x+3x+4x+...+100x=-213
b)\(\frac{1}{2}x-\frac{1}{3}=\frac{1}{4}x-\frac{1}{6}\)
c)3(x-2)+2(x-1)=10
d)\(\frac{x+1}{3}=\frac{x-2}{4}\)
e)\(\frac{x-6}{7}+\frac{x-7}{8}+\frac{x-8}{9}=\frac{x-9}{10}+\frac{x-10}{11}+\frac{x-11}{12}\)
f)\(\frac{x+32}{11}+\frac{x+23}{12}=\frac{x+38}{13}+\frac{x+27}{14}\)
Cho :
\(A=\frac{19}{24}-\frac{1}{2}-\frac{1}{3}-\frac{7}{24}\)
\(B=\frac{7}{12}+\frac{5}{6}+\frac{1}{4}-\frac{3}{7}-\frac{5}{12}\)
a, Tính A và B
b, Tìm x biết A - x = B
Tìm x, biết:a) 60%x + 0,4x + x :3 2 b)1-left(5frac{3}{8}+x-7frac{5}{24}right):left(-16frac{2}{3}right)c)3frac{1}{4}x-frac{7}{6}xfrac{-5}{12}+1frac{2}{3}Bài 2: Tính:a) A frac{-45.58-45.42}{2+4+6+...+16+18}b)1-2-3+4+5-6-7+...+601-602-603+604b) frac{left(140frac{3}{7}-138frac{5}{12}right):18frac{1}{6}}{0,002}Bài 3: Cho A và B, biết:Afrac{2^{19}.27^3+15.4^9.9^4}{6^9.2^{10}+12^{10}} và B frac{4}{35}+frac{4}{63}+frac{4}{99}+frac{4}{143}+frac{4}{195}Hãy so sánh A & B
Đọc tiếp
Tìm x, biết:
a) 60%x + 0,4x + x :3 =2
b)1-\(\left(5\frac{3}{8}+x-7\frac{5}{24}\right):\left(-16\frac{2}{3}\right)\)
c)\(3\frac{1}{4}x-\frac{7}{6}x=\frac{-5}{12}+1\frac{2}{3}\)
Bài 2: Tính:
a) A= \(\frac{-45.58-45.42}{2+4+6+...+16+18}\)
b)1-2-3+4+5-6-7+...+601-602-603+604
b) \(\frac{\left(140\frac{3}{7}-138\frac{5}{12}\right):18\frac{1}{6}}{0,002}\)
Bài 3: Cho A và B, biết:
A=\(\frac{2^{19}.27^3+15.4^9.9^4}{6^9.2^{10}+12^{10}}\) và B= \(\frac{4}{35}+\frac{4}{63}+\frac{4}{99}+\frac{4}{143}+\frac{4}{195}\)
Hãy so sánh A & B
Tìm x:a) 1dfrac{3}{4} . x + 1dfrac{1}{2} dfrac{-4}{5}b) x ( dfrac{1}{5} + dfrac{1}{4} ) - ( dfrac{1}{7} + dfrac{1}{8} ) 0c) | x | 3,5d) | x | -2,7e) | 1 - x | + 0,73 3f) 52 . 73 . 11x + 52 . 72 .11 0g) (3 . 5 + 5 . 7)x + ( 3 . 5 + 5 . 7) + (3 . 5 + 5 . 7) 0h) 52 . 72 . 112x - 52 . 72 . 114 0l) | x + dfrac{3}{4} | - 5 -2
Đọc tiếp
Tìm x:
a) \(1\dfrac{3}{4}\) . x + \(1\dfrac{1}{2}\) = = \(\dfrac{-4}{5}\)
b) x ( \(\dfrac{1}{5}\) + \(\dfrac{1}{4}\) ) - ( \(\dfrac{1}{7}\) + \(\dfrac{1}{8}\) ) = 0
c) \(|\) x \(|\) = 3,5
d) \(|\) x \(|\) = -2,7
e) \(|\) 1 - x \(|\) + 0,73 = 3
f) 52 . 73 . 11x + 52 . 72 .11 = 0
g) (3 . 5 + 5 . 7)x + ( 3 . 5 + 5 . 7) + (3 . 5 + 5 . 7) = 0
h) 52 . 72 . 112x - 52 . 72 . 114 = 0
l) \(|\) x + \(\dfrac{3}{4}\) \(|\) - 5 = -2
Tìm tập hợp các số nguyên x thỏa mãn :
a) \(3\frac{1}{3}:2\frac{1}{2}-1
Tìm x:a)\(\left(x-\frac{1}{2}\right)=\frac{1}{4}\)
b)2x(x-1)=2(x-3)\(^2\)+7
Bai1:tìm x biết a, (frac{1}{7}cdot x -frac{2}{7})(-frac{1}{5}x+frac{3}{5})(frac{1}{3}cdot x+frac{4}{3})b, frac{1}{6}cdot x+frac{1}{10}cdot x-frac{4}{5}cdot x+10c,(x-frac{2}{9})^3(frac{2}{3})^6d, (x-7)^x+1-(x-7)^x+110
Đọc tiếp
Bai1:tìm x biết
a, (\(\frac{1}{7}\)\(\cdot\) x -\(\frac{2}{7}\))(-\(\frac{1}{5}x+\frac{3}{5}\))(\(\frac{1}{3}\cdot x+\frac{4}{3}\))
b, \(\frac{1}{6}\cdot x+\frac{1}{10}\cdot x-\frac{4}{5}\cdot x+1=0\)
c,(\(x-\frac{2}{9}\))^3=(\(\frac{2}{3}\))^6
d, (x-7)^x+1-(x-7)^x+11=0
3 tháng 7 2019 lúc 7:56
Tìm x , biết :
a) \(\left(\frac{1}{7}x-\frac{2}{7}\right)\left(\frac{-1}{5}x+\frac{3}{5}\right)\left(\frac{1}{3}x+\frac{4}{3}\right)=0\)
b) \(\frac{1}{6}x+\frac{1}{10}x-\frac{4}{15}x+1=0\)
frac{4}{9}:frac{-1}{7}+6frac{5}{9}.frac{2}{3}left(frac{-1}{3}right)^4.frac{4}{11}+frac{7}{11}.left(frac{-1}{3}right)^2left(frac{-1}{7}right)^0-2frac{4}{9}:left(frac{2}{3}right)^2left(frac{1}{3}-frac{5}{6}right)^2+frac{5}{6}:2Tìm xleft(frac{3}{5}-frac{1}{2}xright)^2+812frac{7}{12}-left|frac{1}{3}-frac{1}{2}xright|frac{1}{3}frac{13}{12}-frac{1}{3}.left|frac{1}{5}-frac{1}{3}xright|frac{1}{2}Nhanh hộ mình nhaCảm ơn mn
Đọc tiếp
\(\frac{4}{9}:\frac{-1}{7}+6\frac{5}{9}.\frac{2}{3}\)
\(\left(\frac{-1}{3}\right)^4.\frac{4}{11}+\frac{7}{11}.\left(\frac{-1}{3}\right)^2\)
\(\left(\frac{-1}{7}\right)^0-2\frac{4}{9}:\left(\frac{2}{3}\right)^2\)
\(\left(\frac{1}{3}-\frac{5}{6}\right)^2+\frac{5}{6}:2\)
Tìm x
\(\left(\frac{3}{5}-\frac{1}{2}x\right)^2+8=12\)
\(\frac{7}{12}-\left|\frac{1}{3}-\frac{1}{2}x\right|=\frac{1}{3}\)
\(\frac{13}{12}-\frac{1}{3}.\left|\frac{1}{5}-\frac{1}{3}x\right|=\frac{1}{2}\)
Nhanh hộ mình nha
Cảm ơn mn