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2) 3x + 2y = 10
Despejo x en ecuación 2
3x + 2y = 10
3x = 10 - 2y
x = (10 - 2y)/3
Sustituyo el despeje de x en ecuación 1
4x - 5y = - 2
4 (10 - 2y)/3 - 5y = - 2
( - 8y + 40 - 15y)/3
- 8y + 40 - 15y = 3 (- 2)
- 23y 40 = - 6
- 23y = - 6 - 40
- 23y = - 46
y = - 46/-23
y = 2
Sustituyo el valor de y en el despeje de x
x = (10 - 2y)/3
x = (10 - 2 (2)/3
x = (10 - 4)/3
x = 6/3
x = 2
x = 2
y = 2