Answer:
(C) 5
Step-by-step explanation:
x+7=2y
Subtract 7 from both sides
x=2y-7
2y-7=x
Multiply both sides by 2
4y-14=2x
y=2x−1
Add 1 to both sides
y+1=2x
Combine equations:
y+1=4y-14
Add 14 to both sides
y+15=4y
Subtract y from both sides
15=3y
3y=15
Divide both sides by 3
y=5
The answer is (C) 5.
