求未知数X. 2x+71/4=5x-23/4 4.5:12/7=11/3:(4-x)
问题描述:
求未知数X.
2x+7
=5x-21 4
4.5:13 4
=12 7
:(4-x) 1 3
答
(1)2x+714=5x− 234, 2x+714−2x=5x− 234−2x, 3x− 234=714, 3x-234+234=714+234, &n...