Question

[bui thi thanh]

Bài 1 : Tìm số nguyên x biết :

a, 11 - ( 15 + 11 ) = x - ( 25 - 9 )

b, 2 - x = 17 - ( - 5 )

c, x - 12 = ( - 9 ) - 15

d, 9 - 25 = ( 7 - x ) - ( 25 + 7 )

Answer 1

[๒ạςђ ภђเêภ♕]

a, 11 - ( 15 + 11 ) = x - ( 25 - 9 )

11-15-11=x-25+9

-15=x-16

x=1

b, 2 - x = 17 - ( - 5 )

2-x=22

x=-20

c, x - 12 = ( - 9 ) - 15

x-12=-24

x=-12

d, 9 - 25 = ( 7 - x ) - ( 25 + 7 )

(7-x)-32=-16

7-x=16

x=-9

#H