(数学)解比例.2.4×3-3x=3/10
问题描述:
(数学)解比例.2.4×3-3x=3/10
答
7.2 - 3 x = 3 / 10
7.2 - 3 / 10 = 3 x
3 x = 7.2 - 0.3
3 x = 6.9
x = 6.9 ÷ 3
x = 2.3
加油!