2100x+700y=84;900x+2700y=180的解韪步骤
问题描述:
2100x+700y=84;900x+2700y=180的解韪步骤
答
2100x+700y=84 (1)
900x+2700y=180 (2)
化简得
150x+50y=6 (3)
150x+450y=30 (4)
(4)-(3)
y=0.06
代入(3)得
x=0.02