∙{2x+3y=75x−y=9
{2x+3y=7y=5x−9
2x+3(5x−9)=7
2x+15x=7+27
x=2
Sustituimos
2⋅2+3y=7
y=1
∙{x−2y=52x−3y=9
{x=5+2y2x−3y=9
2(5+2y)−3y=9
10+4y−2y=9
y=−1
Sustituimos
x=5−2⋅1
x=3
∙{2x+y=75x−3y=1
{y=7−2x5x−3y=1
5x−3(7−2x)=1
x=2
Sustituimos
y=7−2⋅2
y=3
∙{5x−2y=52x−3y=−9
{x=3y−925x−2y=5
5(3y−92)−2y=5
15y−452−2y=5
15y−45−4y=10
y=5
Sustituimos
x=15−92
x=3
∙{2x+5y=−23x−2y=16
{x=−2−5y23x−2y=16
3(−2−5y2)2y=16
−6−15y2−2y=16
−6−15y−4y=32
y=−2
Sustituimos
x=−2+5⋅22
x=4
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