Question

[x-15,2]+7,69=21,43

Answer 1

=>x-15,2=13,74

hay x=28,94

Answer 2

\(\left(x-15,2\right)+7,69=21,43\\ \Rightarrow x-15,2=21,43-7,69\\ \Rightarrow x-15,2=13,74\\ \Rightarrow x=13,74+15,2\\ \Rightarrow x=28,94\)

Answer 3

( x - 15,2 ) + 7,69 = 21,43

x - 15,2 = 21,43 - 7,69

x - 15,2 = 13,74

x = 13,74  + 15,2

x = 28,94

Tick mình nha! Thanks bạn nhiều

Answer 4

x - 15,2 = 21,43 - 7,69

x - 15,2 = 13,74

       x    = 13,74 + 15,2

       x    = 28,94