Question

Tim x: 

X-1va4/5=10/5

5.85:x=26-25.5

151--2*(x-6) =2227:17

2/3-1/3*x=1/4

Answer 1

a) \(x-1\frac{4}{5}=\frac{10}{5}\)

\(\Rightarrow x=2+1\frac{4}{5}=3\frac{4}{5}=\frac{19}{5}\)

b) \(5,85:x=26-25,5\)

\(\Leftrightarrow5,85:x=0,5\)

\(\Rightarrow x=5,85:0,5=11,7\)

c) \(151-\left(-2\right).\left(x-6\right)=2227:17=131\)

\(\Rightarrow\left(-2\right).\left(x-6\right)=151-131=20\)

\(\Rightarrow\left(x-6\right)=20:\left(-2\right)=-10\)

\(\Rightarrow x=-4\)

d) \(\frac{2}{3}-\frac{1}{3}x=\frac{1}{4}\)

\(\Rightarrow \frac{1}{3}x=\frac{2}{3}-\frac{1}{4}=\frac{5}{12}\)

\(\Rightarrow x=\frac{5}{12}:\frac{1}{3}=\frac{5}{4}\)

dấu chấm (.) là dấu nhân nhé

Answer 2

Ban co chac ket qua dung ko