3(x+5)+2x=45
问题描述:
3(x+5)+2x=45
答
3(x+5)+2x=45
3x+15+2x=45
5x=45-15
5x=30
x=6
3(x+5)+2x=45
3(x+5)+2x=45
3x+15+2x=45
5x=45-15
5x=30
x=6