5x=7[x-10]
问题描述:
5x=7[x-10]
答
5x=7[x-10]
5x=7x-70
7x-5x=70
2x=70
x=35
5x=7[x-10]
5x=7[x-10]
5x=7x-70
7x-5x=70
2x=70
x=35