Question

método de igualación 2x-3y=10 y de 7x-3y=20​

Answer 1

Respuesta:

x = 2  ;  y = -2

Explicación paso a paso:

2x-3y = 10   =>         x = (10+3y)/2

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7x-3y = 20   =>      x = (20+3y)/7

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(10+3y)/2 = (20+3y)/7

70+21y = 40+6y

15y =  -30

y = -2

2x - 3y = 10

2x - (-6) = 10

2x + 6 = 10

2x = 4

x = 2