5x>4x-1 7x+2小于5x-4
问题描述:
5x>4x-1 7x+2小于5x-4
答
5x>4x-1
5x-4x>-1
x>-1
7x+2小于5x-4
7x-5x
5x>4x-1 7x+2小于5x-4
5x>4x-1
5x-4x>-1
x>-1
7x+2小于5x-4
7x-5x