问题
解答题
化简:
(1)5x-(3x-2y);
(2)7x-[-2x-(8x-1)].
答案
(1)5x-(3x-2y);
=5x-3x+2y
=2x+2y;
(2)7x-[-2x-(8x-1)]
=7x-[-2x-8x+1]
=7x+2x+8x-1
=17x-1.
化简:
(1)5x-(3x-2y);
(2)7x-[-2x-(8x-1)].
(1)5x-(3x-2y);
=5x-3x+2y
=2x+2y;
(2)7x-[-2x-(8x-1)]
=7x-[-2x-8x+1]
=7x+2x+8x-1
=17x-1.