Solve the system of equations and choose the correct answer from the list of options. x – y = 7 y = 3x + 12
Mathematics
math1234567891
Question
Solve the system of equations and choose the correct answer from the list of options.
x – y = 7
y = 3x + 12
x – y = 7
y = 3x + 12
2 Answer

1. User Answers Anonym
xy=7
y=3x+12
y3x=12
+
y+x=7
=
2x=19
x=9.5
y=16.6. Hope it help! 
2. User Answers gomezgerman032
Answer: x=9.5
y=16.5
Stepbystep explanation:
Hi, to solve this problem we have to apply the substitution method:
xy =7 (a)
y=3x+12(b)
Replacing the value of "y" in (a) for (b):
x (3x+12)=7
x3x12=7
x3x =7+12
2x =19
x=19/2
x=9.5
Replacing the value of "x" in (b)
y=3x+12
y=3(9.5)+12
y= 28.5+12
y=16.5
Feel free to ask for more if needed or if you did not understand something.