Question

25+5x=39+3x怎么解方程，3（2x-3)+15=7(x-1)怎么解方程

希望简单，又不少步骤谢谢，快快快快快快快快快快快快快快快快快快快快快快快快快快x10000000000000000000000000谢谢

Answer 1

1. 25+5x=39+3x

   -->5x-3x=39-25 (方程左右移动)

   -->2x=14

   -->x=7

2. 3（2x-3)+15=7(x-1)

   --> 6x-9+15=7x-7 (去括号)

   --> 6x-7x= -7-15+9

   --> -x=-13

   -->x=13

望采纳~谢谢~

Answer 2

25+5x=39+3x
2x=14
x=7

3（2x-3)+15=7(x-1)
6x-9+15=7x-7
x=13

Answer 3

25+5x=39+3x
5x-3x=39-25
2x=14
x=7
3(2x-3)+15=7(x-1)
6x-9=7x-7
7x-6x=-9+7+15
x=13