\(\left(x-2\right)^2=\left(x-4\right)^2\)
\(\left(x-2\right)^2=0\)
\(x-2=0\)
\(x=2\)
\(770\div\left[\left(20x+10\right)\div x\right]=35\)
\(\frac{20x+10}{x}=22\Rightarrow20x+10=22x\Rightarrow2x=10\Rightarrow x=5\)
\(\left(x-2\right)^2=\left(x-4\right)^2\)
\(\left(x-2\right)^2=0\)
\(x-2=0\)
\(x=2\)
\(770\div\left[\left(20x+10\right)\div x\right]=35\)
\(\frac{20x+10}{x}=22\Rightarrow20x+10=22x\Rightarrow2x=10\Rightarrow x=5\)
Tìm x biết
\((1+X)+\left(2+X\right)+\left(3+X\right)+...+\left(10+X\right)=75\)\(X\div[\left(1800+600\right)\div30]=560\div\left(315-35\right)\)
Tìm số tn biết
770÷[(20x+10)÷x]=35
30-[4 (x-2)+15]=3
\(\left[8X-120\div4\right].3^3=3^6\)
\(\left\{X^2-[8^2-\left(5^2-8.3\right)^3-7.9]^3-4.12\right\}^3=1\)
\(2\frac{2}{3}\div\left\{\left[\left(3,72-0,02\times x\right)\frac{10}{37}\right]\div\frac{5}{6}+2,8\right\}-\frac{7}{15}=0,2\)
Tìm x biết
\(a,\left[20\%x+\frac{2}{5}x-2\right]\div\frac{1}{3}=2013\)
\(b,\left[4,5-2\left|x\right|\right]\times1\frac{4}{7}=\frac{11}{14}\)
Tìm x, biết:
\(\frac{11}{4}\div\frac{3}{2}\div\left|4x-\frac{1}{3}\right|=\frac{7}{2}\)
\(\left|x-1\right|=3x+2\)
Tìm x:
\(\left(x+\frac{1}{4}-\frac{1}{3}\right)\div\left(2+\frac{1}{6}-\frac{1}{4}\right)=\frac{7}{46}\)
\(\left(0,66-0,012\div0,2\right)\div\left(1-1\frac{4}{7}\times0,4\right)=2\frac{9}{13}\times x\div\left(3,125-5,6\div2\frac{2}{3}\right)\)
Cho mình xin cả cách làm nữa
tìm\(x\in z\)biết :
a.\(\frac{13}{15}-\left(\frac{13}{21}+x\right)\times\frac{7}{12}=\frac{7}{10}\)
b.\(\left(x+\frac{1}{4}-\frac{1}{3}\right)\div\left(2+\frac{1}{6}-\frac{1}{4}\right)=\frac{7}{46}\)
Tìm các số nguyên x thỏa mãn :
a, \(\left(x-2\right)\left(x-7\right)< 0\)
b, \(\left(x^2-3\right)\left(x^2-10\right)< 0\)
c, \(\left(x^2-1\right)\left(x^2-4\right)\left(x^2-7\right)\left(x^2-10\right)< 0\)
d, \(\left(x^3+5\right)\left(x^3+10\right)\left(x^3+15\right)\left(x^3+30\right)< 0\)