Use substitution to solve for y in the system of equations. 5x + y = 6 3x  3y = 18 A. y = 4 B. y = 8 C. y = 16 D. y = 2
Mathematics
grandmamom12
Question
Use substitution to solve for y in the system of equations.
5x + y = 6
3x  3y = 18
A. y = 4
B. y = 8
C. y = 16
D. y = 2
5x + y = 6
3x  3y = 18
A. y = 4
B. y = 8
C. y = 16
D. y = 2
2 Answer

1. User Answers randahlschreck
a 4 is the answer i am for sure i am right 
2. User Answers cher
Equation 1: 5x + y = 6
Equation 2: 3x  3y = 18
Multiply all of equation 1 by 3.
1) 3(5x+y=6)
1) 15x + 3y = 18
2) 3x  3y = 18
Add equations together.
18x = 36
Divide both sides by 18.
x = 2
Plug in 2 for x in first equation.
5x + y = 6
5(2) + y = 6
10 + y = 6
Subtract 10 from both sides.
y = 6  10
y = 4
So, your answer is a) 4
~Hope I helped!~