解方程组(1)3a+b/2=1a/3,a-3b=2 (2)x/2-y/3=4,x/3+y/6=5

问题描述:

解方程组(1)3a+b/2=1a/3,a-3b=2 (2)x/2-y/3=4,x/3+y/6=5

(1)3a+b/2=1a/3,a-3b=2
整理得:
7a+3b=0 ①
a-3b=2 ②
①+②得:
8a=2
∴a=1/4
b=11/4
(2)x/2-y/3=4,x/3+y/6=5
整理得:
3x-2y=24 ①
4x+2y=60 ②
①+②得:
7x=84
∴x=12
y=6