①:50*(x+0.2)=60*(x-1) ②:50*(x-2+8)=(50+10)*(x-2-5)
问题描述:
①:50*(x+0.2)=60*(x-1) ②:50*(x-2+8)=(50+10)*(x-2-5)
答
① 50(x+0.2)=60(x-1),50x+10=60x-60,10x=70,x=7.②50(x-2+8)=(50+10)(x-2-7),50(x+6)=60(x-9),50x+300=60x-540,10x=840,x=84.