a) 0,35-0,2x=4,28
0,2x=0,35-4,28
0,2x=-3,93
x=-3,93:0,2
x=-19.65
vậy x=-19,65
b) \(\left(-\frac{1}{2}\right).\left(\frac{4}{5}+x\right)=1\)
\(\frac{4}{5}+x=1:\left(-\frac{1}{2}\right)\)
\(\frac{4}{5}+x=1.\left(-2\right)\)
\(\frac{4}{5}+x=-2\)
\(x=-2-\frac{4}{5}\)
\(x=-\frac{10}{5}-\frac{4}{5}\)
\(x=-\frac{14}{5}\)
vậy \(x=-\frac{14}{5}\)
a) \(0.35-0.2x=4.28\)
\(0.2x=0.35-4.28\)
\(0.2x=-3.93\)
\(x=-3.93:0.2\)
\(x=-19.65\)
Tim x
\(\left(2x\right):\left(-0,35\right)=\left(-1,4\right):1\frac{1}{3}\)
\(\left[5\frac{1}{6}-\left(0,6:7\frac{1}{2}+3\frac{2}{5}.0,35\right)\right]:\left(12-2\frac{2}{3}.4\frac{3}{4}\right)\)
Tính nhanh
tim x :
\(a.\left|x+5\right|=\frac{1}{7}-\left|\frac{4}{3}-\frac{1}{6}\right|\)|
\(b.\left|x+\frac{2}{3}\right|=\frac{1}{2}-\left[\frac{1}{4}-\frac{2}{3}\right]\)đau [ ] là dấu ngoặc đơn nha!
\(c.\left|x-\frac{1}{5}\right|=\left|\frac{-5}{2}\right|-\left[\frac{1}{4}-\frac{2}{3}\right]\)đau [ ] là dấu ngoặc đơn nha!
\(d.\left|x-\frac{5}{2}\right|=\frac{4}{3}-\left[\frac{2}{3}-\frac{1}{6}\right]\)đau [ ] là dấu ngoặc đơn nha!
ai nhanh nhất mk tk !
tìm x
a) \(1\frac{1}{3}:0,8=\frac{2}{3}:\left(0,2x\right)\)
b)\(-\frac{5}{2}x+\frac{3}{4}=\frac{6}{5}x-\frac{1}{2}\)
BT1: Tinh
\(\frac{7}{8}.\left(\frac{2}{12}+\frac{4}{10}\right)\)
\(\frac{3}{2}-\frac{5}{6}:\left(\frac{1}{2}\right)^2+\sqrt{4}\)
BT2: Tim x
\(2.x-\frac{5}{4}=\frac{20}{15}\)
\(\left(x+\frac{1}{3}\right)^3=\left(\frac{-1}{8}\right)\)
Tìm x,biết:
\(a,\)\(\left(2\frac{1}{3}+3\frac{1}{2}\right):\left(x+3\frac{1}{7}\right)+7\frac{1}{2}=1\frac{69}{86}\)
\(b,\left(7+0,00.x\right):24,7-12,3=77,7\)
\(c,\left(\left(6\frac{3}{7}-\frac{0,75-2}{0,35}\right).2,8+1,75\right):0,05=2,35\)
1) \(x\left(\frac{1}{4}+\frac{1}{5}\right)-\left(\frac{1}{7}+\frac{1}{8}\right)\)=0
tim x
tim x
\(a,\left(x-1\right)^2=\left|\frac{1}{4}-\frac{1}{2}-\frac{3}{4}\right|\)
b , \(\left(x^x-8\right).\left(x^2-15\right)< 0\)
Tim x\(\left|\frac{1}{2}-\frac{1}{3}+x\right|=-\frac{1}{4}-\left|y\right|\)
