115-5(x+2)=100
5(x+2)=115-100
5(x+2)=15
x+2 =15:5
x+2 =3
x =3-2
x =1
Vậy x=1
115-5(x+2)=100
5(x+2)= 115--100
5(x+2)= 15
x+2= 15:5
x+2 =3
x= 3-2
x= 1
tk nhé
115- 5(x+2) = 100
=> 5( x+2) = 115- 100
=> 5(x+2) = 15
=> x+2 = 15: 5
=> x+2 = 3
=> x= 1
115 - 5 (x + 2) = 100
5(x + 2) = 115 - 100
5(x + 2) = 15
x + 2 = 15 : 5
x + 2 = 3
x = 3 - 2
x = 1
115 - 5 (x+ 2) = 100
5 (x+ 2) = 115 - 100
5 (x +2) = 15
x +2 = 15/ 5
x +2 = 3
x = 3 - 2
x = 1