Răspuns :
x-y=1 |•(-3). <=> -3x+3y=-3
5x-3y=4. 5x-3y=4
2x=1=>x=1/2
5•1/2-3y=4
5/2-3y=4
-3y=4+5/2
-3y=13/2|•(-1)
y=(13/2)/-3
y=-19/2
5x-3y=4. 5x-3y=4
2x=1=>x=1/2
5•1/2-3y=4
5/2-3y=4
-3y=4+5/2
-3y=13/2|•(-1)
y=(13/2)/-3
y=-19/2
x-y=1
5x-3y=4
y=x-1
5x-3(x-1)=4 ⇒ 5x-3x+3=4 ⇒ 2x=1 x=1/2 y=1/2-1=-1/2
solutia
x=1/2
y=-1/2
5x-3y=4
y=x-1
5x-3(x-1)=4 ⇒ 5x-3x+3=4 ⇒ 2x=1 x=1/2 y=1/2-1=-1/2
solutia
x=1/2
y=-1/2