Question

Bài 1 : tìm x A, 3/2 + x = -5/3 B, 5 2/3 – ( 3/2 + x ) = 4 1/3 C, 2.x – 4/3 = 2/3 D, x/7 = -6/21

Answer 1

A. $x = -\frac{19}{6}$

B. $x = -\frac{1}{6}$

C. $x = 1$

D. $x = -2$

Giải thích:

A. $\frac{3}{2} + x = -\frac{5}{3} \Rightarrow x = -\frac{5}{3} - \frac{3}{2} = -\frac{19}{6}$

B. $5\frac{2}{3} - (\frac{3}{2} + x) = 4\frac{1}{3} \Rightarrow x = -\frac{1}{6}$

C. $2x - \frac{4}{3} = \frac{2}{3} \Rightarrow x = 1$

D. $\frac{x}{7} = -\frac{6}{21} \Rightarrow x = -2$