y 3x=20 5x-3y=4此题怎么解

2025-05-19 17:37:47
推荐回答(1个)
回答1:

y +3x=20 ......(1)
5x-3y=4 ......(2)
(1)*3 + (2):
9x+5x=60+4
14x=64
x=32/7

y+3*32/7=20
y=36/7