Question

Resolva pelo método da substituição
{2x-3y=-16
{5x+3y=2

Answer 1

Resposta

2x-3y=-16

5x+3y=2

2x =-16+3y

x=-16+3y/2

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5(-16+3y/2)+3y=2

-80+15y/2+3y= 2

-80+15y+6y=4

21y= ,4+80

21y= 84

y= 84/21= 4

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x= -16+3y/2

x= -16+3*4/2

x= -16+12/

x=™-4/2= -2