3(x+15)=5x-9
问题描述:
3(x+15)=5x-9
答
3(x+15)=5x-9
3x+45=5x-9
5x-3x=45+9
2x=54
x=27
3(x+15)=5x-9
3(x+15)=5x-9
3x+45=5x-9
5x-3x=45+9
2x=54
x=27