计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
问题描述:
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
答
原式=3x-4y+(2y+x)-(x-3y)-6x
=-3x-4y+(2y+x)-(x-3y)
=-3x-4y+2y+x-x+3y
=-3x+y