2x+1×(40-x)=95
问题描述:
2x+1×(40-x)=95
答
2x+1×(40-x)=95
2x+40-x=95
2x-x=95-40
x=55
2x+1×(40-x)=95
2x+1×(40-x)=95
2x+40-x=95
2x-x=95-40
x=55