问题
解答题
(1)计算: ①3+(-3.5)-5-(-
②(
(2)解方程:
|
答案
(1)①原式=3-3.5-5+0.5
=-5;
②原式=-9-40+66+1
=18;
(2)去分母得:5x-10=10-4x-2,
移项合并得:9x=18,
解得:x=2.
(1)计算: ①3+(-3.5)-5-(-
②(
(2)解方程:
|
(1)①原式=3-3.5-5+0.5
=-5;
②原式=-9-40+66+1
=18;
(2)去分母得:5x-10=10-4x-2,
移项合并得:9x=18,
解得:x=2.