问题
解答题
解方程 (1)3(x+1)-6
(2)
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答案
(1)3(x+1)-6
=8.25,3 4
3(x+1)-6
+63 4
=8.25+63 4
,3 4
3(x+1)=15,
3(x+1)÷3=15÷3,
x+1=5,
x+1-1=5-1,
x=4;
(2)
=x+2 2
,2x+7 5
5(x+2)=2(2x+7),
5x+10=4x+14,
5x+10-4x=4x+14-4x,
x+10=14,
x+10-10=14-10,
x=4.