解:(x-3)×2.4+10+2-10-2=24-2-10
(x-3)×2.4=12
(x-3)×2.4÷2.4=12÷2.4
x-3=5
x-3+3=5+3
x=8
(x-3)×2.4+10+2=24
x-3=(24-12)/2.4
x=3+120/24=3+5=8
x=8
(x-3)×2.4+12=24,
(x-3)×2.4=12,
x-3=5,
x=8.