7x+3y=44,11x+2y=61,求x,y

问题描述:

7x+3y=44,11x+2y=61,求x,y

14x+6y=88
33x+6y=183
19x=95
x=5
y=3

X=5,Y=3

联立两个方程7x+3y=44 (1)11x+2y=61 (2)将方程(1)左右两边同时乘以2,方程(2)左右两边同时乘以3原方程组化为 14x+6y=88 (3)33x+6y=183 (4)用方程(4)-(3)得:33x-14x=183-8819x=95x=5将x=5代入方程(1)得:35...