当x为何值时,代数式3分之3x+1的值比2分之3x+1的值小1?
1个回答
2010-11-22
展开全部
3分之3X+1 + 1 =2分之3X+1
(3分之3X+1)×6 +1×6 =(2分之3X+1)×6
2(3X + 1 )+6 = 3 (3X+1)
6X + 2 + 6 = 9X + 3
6X - 9X = 3 - 2 - 6
-3X = -5
X = 3分之5
(3分之3X+1)×6 +1×6 =(2分之3X+1)×6
2(3X + 1 )+6 = 3 (3X+1)
6X + 2 + 6 = 9X + 3
6X - 9X = 3 - 2 - 6
-3X = -5
X = 3分之5
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