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\(pt\Leftrightarrow\frac{10+2x}{16}=\frac{14}{16}\Leftrightarrow10+2x=14\Leftrightarrow2x=14-10=4\)
\(\Leftrightarrow x=2\)
\(\frac{x}{15}< \frac{4}{15}\)=> x=1,2,3 (1)
\(\frac{5}{9}>\frac{x}{9}\)=> x=1,2,3,4 (2)
\(1< \frac{x}{8}< \frac{11}{8}\)=> x=9,10 (3)
Từ (1),(2),(3) => đề bài sai
\(22+\frac{x}{49}=\frac{5}{7}\)
=>\(\frac{x}{49}=\frac{5}{7}-22\)
\(\Rightarrow\frac{x}{49}=-\frac{149}{7}\)
\(\Rightarrow x=-\frac{149}{7}\cdot49\)
\(\Rightarrow x=-1043\)
22 + \(\frac{X}{49}\)= \(\frac{5}{7}\)
\(\frac{X}{49}\)= 22 - \(\frac{5}{7}\)= \(\frac{149}{7}\)
X = \(\frac{149}{7}\)X 49
X = 1043
\(14,P=x^2+xy+y^2-3x-3y+3\\ P=\left(x^2+xy+\dfrac{1}{4}y^2\right)-3\left(x+\dfrac{1}{2}y\right)+\dfrac{3}{4}y^2-\dfrac{3}{2}y+3\\ P=\left(x+\dfrac{1}{2}y\right)^2-3\left(x+\dfrac{1}{2}y\right)+\dfrac{9}{4}+\dfrac{3}{4}\left(y^2-2y+1\right)\\ P=\left(x+\dfrac{1}{2}y-\dfrac{3}{2}\right)^2+\dfrac{3}{4}\left(y-1\right)^2\ge0\)
\(5+\frac{x}{8}=\frac{14}{16}\)
\(\frac{x}{8}=\frac{14}{16}-5\)
\(\frac{x}{8}=-\frac{33}{6}\)
\(\Rightarrow6x=-33\times8\)
\(\Rightarrow6x=-264\)
\(\Rightarrow x=-44\)
Vậy \(x=-44\)
\(5+\frac{x}{8}=\frac{5}{1}+\frac{x}{8}=\frac{40}{8}+\frac{x}{8}\)\(=\frac{14}{16}=\frac{7}{8}\)
Vay \(\frac{x}{8}=\frac{7}{8}-\frac{40}{8}=\)...............tự làm tiếp