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2) 3x - y = - 14
Despejo y en 2
3x - y = - 14
3x + 14 = y
y = 3x + 14
Sustituyo y en 1
- 2x + 3y = 14
- 2x + 3 (3x + 14) = 14
- 2x + 9x + 42 = 14
7x = 14 - 42
7x = - 28
x = - 28/7
x = - 4
Sustituyo x en el despeje de y
y = 3x + 14
y = 3 (- 4) + 14
y = - 12 + 14
y = 2
x = - 4
y = 2