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1) 4x - 2y = - 10
2) - 2x + 3y = - 1
Despejo x en 1.
4x - 2y = - 10
4x = - 10 + 2y
x = - 10 + 2y
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4
Sustituyo x en 2.
- 2x + 3y = - 1
- 2 (- 10 + 2y) + 3y = - 1
- (4y- 20) + 3y = - 1
- 4y + 20 + 3y = -1
- y = - 1 - 20
- y = - 21
y = 21
Sustituyo el valor de y en x.
x = (- 10 + 2y)/4
x = (- 10 + 2 * 21)/4
x = (- 10 + 42)/4
x = 32/4
x = 8
Solución :
x = 8
y = 21