albertogabriel2003 albertogabriel2003
  • 11-11-2018
  • Mathematics
contestada

5x+7y=41 3x-2y=6 metodo de igualación es una ecuación 2x2

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cmoreno511 cmoreno511
  • 11-11-2018

5x+7y=41

3x-2y=6


Multiply each equation by coefficient to y


2(5x+7y)=2(41 )

7(3x-2y)=7(6 )


Add both equations

10x+14y=82

+ 21x-14y=42

____________

3x = 124

Divide both sides by 3 to find x

3x/3=124/3


X= 4


Now select an equation substitute x to solve for y .


10x+14y=82


10(4)+14y=82


40+14y= 82

Subtract 40 both sides


40-40+14y=82-40


14y= 42


Divide 14 both sides


14y/14=42/14


Y= 3


Your answer is point form ( 4,3)

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