Bài 4: Giá trị tuyệt đối của một số hữu tỉ. Cộng, trừ, nhân, chia số thập phân
Các câu hỏi tương tự
tim x,y biet
a)\(\left(x-y-2\right)^2+7=\frac{14}{\left|y-1\right|+\left|y-3\right|}\)
TN
23 tháng 10 2020 lúc 21:28
Tìm x, biết:
a) \(4\left|3x-1\right|+\left|x\right|-2\left|x-5\right|+7\left|x-3\right|=12\)
b) \(2\left|x+3\frac{1}{2}\right|+\left|x\right|-3\frac{1}{2}=\left|2\frac{1}{5}-x\right|\)
Bài 4: Tính hợp lý
a) Aleft(left|frac{-3}{4}right|+left|frac{-2}{5}right|right):frac{3}{7}+left(frac{-3}{5}+left|frac{-1}{4}right|right):frac{3}{7}
b) B2frac{5}{23}-left(frac{-7}{9}right)-left|frac{-5}{23}right|+frac{12}{9}+left|-0,75right|
Bài 5 : Tìm x :
frac{11}{12}-left(frac{2}{5}+xright)left|frac{-2}{3}right|
b) left|xright|:left(frac{1}{9}-frac{2}{5}right)frac{-1}{2}
c) left(x-frac{1}{5}right).left(1frac{3}{5}+2xright)0
Đọc tiếp
Bài 4: Tính hợp lý
a) \(A=\left(\left|\frac{-3}{4}\right|+\left|\frac{-2}{5}\right|\right):\frac{3}{7}+\left(\frac{-3}{5}+\left|\frac{-1}{4}\right|\right):\frac{3}{7}\)
b) \(B=2\frac{5}{23}-\left(\frac{-7}{9}\right)-\left|\frac{-5}{23}\right|+\frac{12}{9}+\left|-0,75\right|\)
Bài 5 : Tìm x :
\(\frac{11}{12}-\left(\frac{2}{5}+x\right)=\left|\frac{-2}{3}\right|\)
b) \(\left|x\right|:\left(\frac{1}{9}-\frac{2}{5}\right)=\frac{-1}{2}\)
c) \(\left(x-\frac{1}{5}\right).\left(1\frac{3}{5}+2x\right)=0\)
1. Tìm x, biết:
a. \(3x-|x+15|=\frac{5}{4}\)
b. \(\left|x-0,6\right|< \frac{1}{3}\)
c. \(\left|x+\frac{7}{2}\right|\ge\left|-3,5\right|\)
d. \(\left|x-1\right|\le3\frac{1}{4}\)
e. \(\left|2x-1\right|>\left|-\frac{3}{4}\right|\)
\(4.\left(\frac{1}{2}-3\right)-6.\left(\frac{5}{6}x+2\right)=0\)
1, \(\left|2x-3\right|\)= \(\left|x+5\right|\)
2, \(\left|4-2x\right|\)=\(\left|3x\right|\)
3, \(\left|4x-5\right|\) -\(\left|2x+1\right|\) =0
4, \(\left|0,5x-2\right|\) -\(\left|x+\frac{2}{3}\right|\) =0
1 , Tìm x,y biết
|x-y|+\(\left|y+\frac{9}{25}\right|\) = 0
2, Tìm x biết
a, \(\left|x+\frac{11}{2}\right|>\left|-5,5\right|\)
b, \(\frac{2}{5}< \left|x-\frac{7}{5}\right|< \frac{3}{5}\)
LV
7 tháng 12 2017 lúc 11:27
1/ Tìm GTNN:
a,left|7x-5yright|+left|2z-3yright|+left|xy+yz+xz-2000right|
b,left|3x-7right|+left|3x+2right|+8
2/ Tìm x, y:
a, left|x-5right|+left|1-xright|dfrac{12}{left|y+1right|+3}
b,left|y+3right|+5dfrac{10}{left(2x-6right)^2+2}
c,left|x-1right|+left|3-xright|dfrac{6}{left|y+3right|+3}
Đọc tiếp
1/ Tìm GTNN:
a,\(\left|7x-5y\right|+\left|2z-3y\right|+\left|xy+yz+xz-2000\right|\)
b,\(\left|3x-7\right|+\left|3x+2\right|+8\)
2/ Tìm x, y:
a, \(\left|x-5\right|+\left|1-x\right|=\dfrac{12}{\left|y+1\right|+3}\)
b,\(\left|y+3\right|+5=\dfrac{10}{\left(2x-6\right)^2+2}\)
c,\(\left|x-1\right|+\left|3-x\right|=\dfrac{6}{\left|y+3\right|+3}\)
\(\left|x+2\right|=\left|\frac{3}{2}x-1\right|\)