1.3 x+2 x=9.9 x等于多少?

2025-12-14 12:28:24
推荐回答(2个)
回答1:

1.3x+2ⅹ=9.9
3.3ⅹ=9.9
x=3

回答2:

解:1.3x+2x=9.9,
(1.3+2)x=9.9,
3.3x=9.9,
∴ x=3.