3(4x-2y)-3(-y+8x).化简,合并同类项
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3(4x-2y)-3(-y+8x).化简,合并同类项
3(4x-2y)-3(-y+8x).化简,合并同类项
3(4x-2y)-3(-y+8x).化简,合并同类项
3(4x-2y)-3(-y+8x).
=12x-6y+3y-24x
=-12x-3y
3(4x-2y)-3(-y+8x)
=12x-6y+3y-24x
=-12x-3y
原式=12x-6y+3y-24x
=(12-24)x+(-6+3)y
=-12x-3y
纳尼?不一定对啊
12x-6y-(-3y)-24x
=12x-6y+3y-24x
=-12x-3y
完毕。
注意减号后面要变号
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