a+ a+1+a+2 = 24
<=>a+a+a=24-1-2
<=>3a=21
<=>a=21:3=7
vậy a=7
k mk nha bạn
a + a + 1 + a + 2 = 24
3a + 3 = 24
3a = 24 - 3
3a = 21
a = 7
a+ a+1+a+2 = 24
=> (a+a+a)+(1+2)=24
=> 3a = 24 - 3
=> 3a = 21
=> a = 7
a+ a+ 1+ a+ 2 = 24
3a+ 3 = 24
3a = 21
a = 7
Đ/s: a = 7
Ta có: a + a + 1 + a + 2 = 24
=> a + a + a = 24 - ( 1 + 2)
=> 3a = 24 - 3
=> 3a = 21
=> a = 21 : 3
=> a = 7
a+a+1+a+2=24
a x 3 +1+1=24
ax3+3=24
ax3=24-3
ax3=21
a=21:3
a=7
a+a+1+a+2=24
3a+1+2=24
3a+3=24
3a=21
a=7
Các bạn ủng hộ mik nha
a+a+1+a+2=24
a3+1+2=24
a3+3=24
a3=24-3
a.3=21
a=21;3
a=7
a+ a+1+a+2 = 24
=> (a+a+a)+(1+2)=24
=> 3a = 24 - 3
=> 3a = 21
=> a = 7
