解:(x-3.3)+(x-4.8)等于( 2x - 8.1 )
∵已知需求出(x-3.3)+(x-4.8)等于多少
∴(x - 3.3) + (x - 4.8)
= x - 3.3 + x - 4.8
= x + x - (3×10+3)/10 - (4×10+8)/10
= x + x - 33/10 - 48/10
= 2x - 81/10
= 2x - 8.1
答:(x-3.3)+(x-4.8)等于2x - 8.1