二元一次方程组m/3-n/4=7 m-3/2-n-1=1/2

问题描述:

二元一次方程组m/3-n/4=7 m-3/2-n-1=1/2

m/3-n/4=7 4m-3n = 12x7 = 84
m-3/2-n-1=1/2 m-n = 2+1 = 3
m=n+3
4n+9-3n =84
n=75
m= 78