Respuesta :

DecentraNet

Answer:

x = 1, y = 2

Step-by-step explanation:

Original equations:

[tex]x+y=3\\2x+5y=12[/tex]

Substitute y and solve for x:

[tex]y=3-x\\2x+5y=12[/tex]

[tex]2x+5(3-x)=12[/tex]

[tex]2x+15-5x=12[/tex]

[tex]-3x=-3[/tex]

[tex]x=1[/tex]

Plug in x to solve for y:

[tex]1+y=3[/tex]

[tex]y=2[/tex]

x = 1, y = 2

Note: You can also substitute x and solve for y, then plug in y to solve for x. I did not do that here.

monalilama06

Answer:

x+y=3

x=3-y equation 1

2x+5y=12

2(3-y)+5y=12

6-2y+5y=12

6+3y=12

3y=12-6

y=6÷3

y=2 equation 2

again ,

putting value of equation 2 in equation 1

x=3-y

x=3-2

x=1

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