解方程：10÷x=4/7，3/4x+1/4=1/2，×-9/10=3.8

Question

如题所述

Answer 1

(1)
10÷x=4/7
x=10/(4/7)
x=10*7/4
x=35/2
x=17.5
(2)
3/4x+1/4=1/2

(3/4)x=1/2-1/4
(3/4)x=1/4
x=(1/4)*4/3
x=1/3
(3)
×-9/10=3.8
x-0.9=3.8
x=3.8+0.9
x=4.7

Answer 2

本回答被提问者采纳

Answer 3

70/4
1/3
4.7