7.5x+4.5x=20 x=?
问题描述:
7.5x+4.5x=20 x=?
答
7.5x+4.5x=20
(7.5+4.5)x=20
12x=20
x=1.67
7.5x+4.5x=20 x=?
7.5x+4.5x=20
(7.5+4.5)x=20
12x=20
x=1.67