Toán Lớp 6: a) x – 5 = – 1 b)x + 30 = – 4 c) x – (- 24) = 3 d) 22 – (- x) = 12

TRẢ LỜI

1. $\text{a) x – 5 = -1}$

   $\text{x = ( -1 ) + 5}$

   $\text{x = 4}$

   $\text{Vậy x = 4}$

   $\text{b) x + 30 = -4}$

   $\text{x = ( -4 ) – 30}$

   $\text{x = -34}$

   $\text{Vậy x = -34}$

   $\text{c) x – ( – 24 ) = 3}$

   $\text{x + 24 = 3}$

   $\text{x = 3 – 24}$

   $\text{x = – 21}$

   $\text{Vậy x = -21}$

   $\text{d) 22 – ( – x ) = 12}$

   $\text{22 + x = 12}$

   $\text{x = 12 – 22}$

   $\text{x = -10}$

   $\text{Vậy x = -10}$

   Trả lời
2. a) x – 5 = – 1

   x=-1+5

   x=4

   Vậy x=4

   b)x + 30 = – 4

   x=-4-30

   x=-34

   Vậy x=-34

   c) x – (- 24) = 3

   x=3+24

   x=27

   Vậy x=27

   d)22-(-x)=12

   22+x=12

   x=12-22

   x=-10

   Vậy x=-10

   Trả lời