Question

tìm x

213+(x-25)=-187

2.(x-2)+17=-13

x-8 -13=-8

x+11 +14=15

 

Answer 1

213 + (X - 25) = -187

=> x - 25 = -187 - 213

=> x = -187 - 213 + 25

=> x = -375

2.(x - 2) + 17 = -13

=> 2.(x - 2) = -13 - 17

=> 2.(X - 2) = -30

=> x - 2 = -30:2

=> x - 2 = -15

=> x = -15 + 2

=> x = -13

x - 8 - 13 = -8

=> x - 21 = -8

=> x = -8 + 21

=> x = 13

x + 11 + 14 = 15

=> x + 25 = 15

=> x = 15 - 25

=> x = -10

Answer 2

a) x- 25= -187 - 213 = -400

   x= -400:25 = -16

b) 2.(x-2) = -13- 17 = -30

       x- 2 = -30 :2 = -15

       x= -15+2 = -13

c) x-8 = -8+13 = 5

   x= 5+8 = 13

d) x+11 = 15-14 = 1

 x= 1-11 = -10

Answer 3

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