{3x+4y=39-2y 5x+3y=2x+30
问题描述:
{3x+4y=39-2y 5x+3y=2x+30
答
{3x+4y=39-2y
{5x+3y=2x+30
{3x+6y=39
{3x+3y=30
{x+2y=13
{x+y=10
y=3
x=7
所以方程组的解是:
{x=7
{y=3