carmenwright03
carmenwright03 carmenwright03
  • 24-02-2017
  • Mathematics
contestada

does anybody know how to solve this problem? it has to deal with systems by substituting

does anybody know how to solve this problem it has to deal with systems by substituting class=

Respuesta :

cher
cher cher
  • 07-05-2017
Equation 1)  x - y = 5
Equation 2)  3x - 2y = 12

Multiply the first equation by 2.

1)  2(x - y = 5)

1)  2x - 2y = 10
2)  3x -2y = 12

Subtract equations from one another.

-x = -2

x = 2

Plug in 2 for x in the first equation.

x - y = 5

(2) - y = 5

Subtract 2 from both sides.

-y = 5 - 2

-y = 3

Divide both sides by -1.

y = -3

So, x = 2, y = -3

~Hope I helped!~
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