Question

解方程组2分之x+y-2分之3y=2分之5,2分之3x+2y=0

Answer 1

x+y除以2-2分之3y=2分之5

x+y-3y=5

x-2y=5 (1)

2分之3x+2y=0

3x+4y=0 (2)

(1)*2+(2)

5x=10

x=2

y=-3/2