Câu hỏi của ho thi mai linh

Question

Tìm x:a) 23/15 - 2/3 * x = 0,2b) x/3 = 2/3 + -1/7

Dương · Accepted Answer

$a,\frac{23}{15}-\frac{2}{3}x=0,2$$\frac{2}{3}x=\frac{4}{3}$$x=2$$b,\frac{x}{3}=\frac{2}{3}+\left(\frac{-1}{7}\right)$$\Rightarrow\frac{x}{3}=\frac{11}{21}$$\Rightarrow x.21=3.11$$\Rightarrow21x=33$$\Rightarrow x=\frac{11}{7}$Câu trả lời: $a,\frac{23}{15}-\frac{2}{3}x=0,2$$\frac{2}{3}x=\frac{4}{3}$$x=2$$b,\frac{x}{3}=\frac{2}{3}+\left(\frac{-1}{7}\right)$$\Rightarrow\frac{x}{3}=\frac{11}{21}$$\Rightarrow x.21=3.11$$\Rightarrow21x=33$$\Rightarrow x=\frac{11}{7}$

ღღ_๖ۣ nhók_lùn ❣_ღღ · Answer

a.  $\frac{23}{15}-\frac{2}{3}x=0,2$$\frac{23}{15}-\frac{2}{3}x=\frac{1}{5}$$\frac{2}{3}x=\frac{23}{15}-\frac{1}{5}$$\frac{2}{3}x=\frac{4}{3}$$x=\frac{4}{3}:\frac{2}{3}$$x=2$Vậy  $x=2$b.   $\frac{x}{3}=\frac{2}{3}+\frac{-1}{7}$$\frac{x}{3}=\frac{11}{21}$$\frac{7x}{21}=\frac{11}{21}$$\Rightarrow7x=11$$x=11:7$$x=\frac{11}{7}$Vậy$x=\frac{11}{7}$Câu trả lời: a.  $\frac{23}{15}-\frac{2}{3}x=0,2$$\frac{23}{15}-\frac{2}{3}x=\frac{1}{5}$$\frac{2}{3}x=\frac{23}{15}-\frac{1}{5}$$\frac{2}{3}x=\frac{4}{3}$$x=\frac{4}{3}:\frac{2}{3}$$x=2$Vậy  $x=2$b.   $\frac{x}{3}=\frac{2}{3}+\frac{-1}{7}$$\frac{x}{3}=\frac{11}{21}$$\frac{7x}{21}=\frac{11}{21}$$\Rightarrow7x=11$$x=11:7$$x=\frac{11}{7}$Vậy$x=\frac{11}{7}$

Khoá học trên OLM (olm.vn)

Khoá học trên OLM (olm.vn)