解方程:(1)17-- 120%x =5 (2)x -- 12%x =2.816 (3)5分之4 × 4分之1 -- 2分之1x =
问题描述:
解方程:(1)17-- 120%x =5 (2)x -- 12%x =2.816 (3)5分之4 × 4分之1 -- 2分之1x =
(4)x + 9分之7x = 3分之4 (5)4分之3x + 5%x =17.6
答
(1)17-- 120%x =5 1.2x=17-51.2x=12x=10(2)x -- 12%x =2.816 0.88x=2.816x=2.816÷0.88x=3.2(3)5分之4 × 4分之1 -- 2分之1x = 20分之11/5-1/2x=1/201/2x=1/5-1/201/2x=3/20x=3/10(4)x + 9分之7x = 3分之4...