解方程组2u-5v=12,4u+3v=-2
问题描述:
解方程组2u-5v=12,4u+3v=-2
答
2u-5v=12,(1)
4u+3v=-2 (2)
(1)乘以2-(2)得:
-13v=26
v=-2 (3)
(3)带入(1)解得:
u=1