nicolafilipi nicolafilipi
  • 15-12-2020
  • Mathematics
contestada

Solve the system of linear equations by substitution x-y=2 x+2y=5

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zoes077
zoes077 zoes077
  • 15-12-2020
Can anyone help me with my questions
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devishri1977
devishri1977 devishri1977
  • 15-12-2020

Answer:

x = 3

y = 1

Step-by-step explanation:

x - y = 2    ---------------(I)

x + 2y= 5 ----------------(II)

x - y = 2

   x = 2 + y       _________(III)

Substitute x = 2 + y in equation (II)

2 + y + 2y = 5           {combine like terms}

     2 + 3y  = 5

           3y  = 5 -2

            3y = 3

              y = 3/3

y = 1

Substitute y = 1 in equation (III)

x = 2 + 1

x = 3

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