合并同类项:4-x+4x-7,x-5x+5/3x-1/2
问题描述:
合并同类项:4-x+4x-7,x-5x+5/3x-1/2
答
4-x+4x-7
=(-1+4)x+(4-7)
=3x-3
x-5x+5/3x-1/2
=(1-5+5/3)x-1/2
=(-7/3)x - 1/2
答
=(4-7)+(4x-x)
=3x-3
=(x-5x+5x/3)-1/2
=(-4x+5x/3)-1/2
=-7x/5-1/2