Question

quanto e 2x+3y=1
x-y=3

Answer 1

2x + 3y = 1
x-y=3 (3)

• 2x+ 3y= 1
3x-3y= 9
5x=10
x= 10/5
x=2
• 2x+3y= 1
2*2+3y=1
4+3y=1
3y= 1-4
3y= -3
y=-3/3
y=-1