Question

Solve the following system:

Answer 1

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) <==

Answer 2

Answer:

option B $(4,7)$

Step-by-step explanation:

we have

$y=x+3$ -----> equation A

$3x+y=19$ -----> equation B

Substitute equation A in equation B

$3x+[x+3]=19$

$3x+x=19-3$

$4x=16$

$x=4$

Find the value of y

$y=x+3$

$y=4+3=7$

the solution is the point $(4,7)$