(9÷×-7)×0.6+1998=2010怎么算求×等于多少
问题描述:
(9÷×-7)×0.6+1998=2010怎么算求×等于多少
答
(9/x-7)*0.6=12,解得x=1/3
答
(9-7x)x0.6+1998x=2010x
5.4-4.2x=12x
5.4=16.2x
1/3=x
答
(9÷×-7)×0.6+1998=2010
(9÷×-7)×0.6=2010-1998
(9÷×-7)×0.6=12
9÷×-7=12÷0.6
9÷×-7=20
9÷x=20+7
9÷x=27
27x=9
x=1/3
答
解方程得
X=1/3