﹣1/3(7x+6y)-[﹣3/5(4x-5y)]
要求括号全去!!
﹣1/3(7x+6y)-[﹣3/5(4x-5y)]
要求括号全去!!
﹣1/3(7x+6y)-[﹣3/5(4x-5y)]
=-7/3x-2y+3/5(4x-5y)
=-7/3x-2y+12/5x-3y
=(36-35)/15x-5y
=1/15x-5y
-1/3 ( 7 x + 6 y ) - [ - 3/5 ( 4 x - 5 y ) ]
解原式= -7/3 x - 2 y - [ - 12/5 x + 3 y ]
= -7/3 x - 2 y + 12/5 x - 3 y
= 1/15 x - 5 y
结果为十五分之一X减五Y .
﹣1/3(7x+6y)-[﹣3/5(4x-5y)]
=-7/3X+(-2y)-[-12/5X-(-3y)]
=-7/3X-2y-[-12/5X+3y]
=-7/3X-2y+12/5X-3y
=1/15X-5y
有任何问题请追问!!!
-7x/3-2y+12x/5-3y