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5x-2y=13
-5(x+3y=6)
5x-2y=13
-5x-15y= -30
5x-2y= 13
-17y=-17
y= -17/-17
y=1
x+3(1)=6
x+3=6
x = 6-3
x= 3
y=1
x=3
1) x + 3y = 6
2) 5x - 2y = 13
Despejo x en ecuación 1.
x + 3y = 6
x = 6 - 3y
Sustituyo el despeje de x en ecuación 2.
5x - 2y = 13
5 (6 - 3y) - 2y = 13
30 - 15y - 2y = 13
30 - 17y = 13
- 17y = 13 - 30
- 17y = - 17
y = -17/-17
y = 1
Sustituyo el valor de y en el despeje de x.
x = 6 - 3y
x = 6 - 3 (1)
x = 6 - 3
x = 3
Solución :
x = 3
y = 1