问题
解答题
计算
(1)-(5x-4)+(5x-2)
(2)2(x-1)-3(x-4)
答案
(1)原式=-5x+4+5x-2
=(-5x+5x)+(4-2)
=2;
(2)原式=(2x-2)-(3x-12)
=2x-2-3x+12
=(2x-3x)+(-2+12)
=-x+10.
计算
(1)-(5x-4)+(5x-2)
(2)2(x-1)-3(x-4)
(1)原式=-5x+4+5x-2
=(-5x+5x)+(4-2)
=2;
(2)原式=(2x-2)-(3x-12)
=2x-2-3x+12
=(2x-3x)+(-2+12)
=-x+10.