Respuesta :

texaschic101
y = x + 3...so sub in x + 3 for y in the other equation

3x + y = 19
3x + x + 3 = 19
4x + 3 = 19
4x = 19 - 3
4x = 16
x = 16/4
x = 4

y = x + 3
y = 4 + 3
y = 7

so ur solution is (4,7) <==
calculista

Answer:

option B [tex](4,7)[/tex]

Step-by-step explanation:

we have

[tex]y=x+3[/tex] -----> equation A

[tex]3x+y=19[/tex] -----> equation B

Substitute equation A in equation B

[tex]3x+[x+3]=19[/tex]

[tex]3x+x=19-3[/tex]

[tex]4x=16[/tex]

[tex]x=4[/tex]

Find the value of y

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

[tex]y=4+3=7[/tex]

the solution is the point [tex](4,7)[/tex]