7(4-x)=9(x-x)解方程
问题描述:
7(4-x)=9(x-x)解方程
答
7(4-x) = 9(x-x)
7(4-x) = 0
4-x = 0
x = 4
7(4-x)=9(x-x)解方程
7(4-x) = 9(x-x)
7(4-x) = 0
4-x = 0
x = 4