3(x-1)-(x-5)怎样化简
问题描述:
3(x-1)-(x-5)怎样化简
答
原式=3x-3×1-x+5
=3x-x+5-3
=2x+2
答
3(x-1)-(x-5)
=3x-3-x+5
=2x+2