问题
解答题
(1)化简:2(4a+b)-2(5a-b);(2)解方程:
|
答案
(1)2(4a+b)-2(5a-b),
=8a+2b-10a+2b,
=-2a+4b;
(2)5(3x+1)-20=3x-2,
15x+5-20=3x-2,
15x-3x=-2-5+20,
12x=13,
x=
.13 12
(1)化简:2(4a+b)-2(5a-b);(2)解方程:
|
(1)2(4a+b)-2(5a-b),
=8a+2b-10a+2b,
=-2a+4b;
(2)5(3x+1)-20=3x-2,
15x+5-20=3x-2,
15x-3x=-2-5+20,
12x=13,
x=
.13 12