解方程 {x+y=60 {3/100x+60/100y=10/100*60

问题描述:

解方程 {x+y=60 {3/100x+60/100y=10/100*60

x+y=60 (1)3/100x+60/100y=10/100*60 (2)(2)*100,得 3x+60y=600 x+20y=200 (3)(3)-(1),得 19y=140 y=140/19把y=140/19代入(1),得 x=1300/19