Question

Answer 1

5) 2.3 + x = 17

6 + x = 17

x = 17 - 6

x = 11

Vậy x = 11

6) 3.4 + x = 15

12 + x = 15

x = 15 - 12

x = 3

Vậy x = 3

7) x - 195 : 21 = 15

x - 65/7 = 15

x = 15 + 65/7

x = 170/7

Vậy x = 170/7

8) x - 382 = 159 : 3

x - 382 = 53

x = 53 + 382

x = 435

Vậy x = 435

Answer 2

5)\(2.3+x=17\)
\(\Rightarrow x=17-6=11\)
6)\(3.4+x=15\)
\(\Rightarrow x=15-12=3\)
7)\(x-195:21=15\)
\(\Rightarrow x=15+\dfrac{65}{7}=15\dfrac{65}{7}\)
8)\(x-382=159:3\)
\(\Rightarrow x=53+382=435\)