5.22+(x+3)=52
5.4+(x+3)=25
20+(x+3)=25
x+3=20-25
x+3=-5
x= -5 - 3
x=-8
5.22+(x+3)=52
5.4+(x+3)=25
20+(x+3)=25
x+3=25-20
x+3=5
x=5-3
x=2
5 . 22 + (x + 3) = 52
5 . 4 + (x + 3) = 25
20 + (x + 3) = 25
x + 3 = 25 - 20
x + 3 = 5
x = 5 - 3
x = 2
Vậy x = 2
Ủng hộ mk nha !!! ^_^