Question

231-x+82=44+x-21

 

Answer 1

145 nha bạn duyệt đi

Answer 2

231 - x + 82 = 44 + x - 21

=> 231 - x + 82 - 44 - x + 21 = 0

=> 290 - 2x = 0

=> 2x = 290

=> x = 145

Answer 3

145 nhé bạn

Answer 4

231-x+82=44+x-21

=> -x-x=-231-82+44-21 ( quy tắc chuyển vế)

-2x= -290

x=-290:-2

x=145

Answer 5

231 + 82 - 44 + 21 = x + x <=> 190 = 2x => x = 190 : 2 = 145

Answer 6

231-x+82=44+x-21

-x-x=44-21-82-231

-2x=-270

x=(-270):(-2)

x=135

Answer 7

thanks