Respuesta :
Answer:
7 books
$27
Step-by-step explanation:
3x + 6= 5x - 8
3x - 5x = -14
-2x= -14
x= 7 books
he has (3×7)+6= $27
Let comics be c and mystery be m
Cost be y
c=m
The equations are
- y=3m+6
- y=5m-8
Solve for m
- 3m+6=5m-8
- 2m=18
- m=7books
He has
- 7(3)+6
- 21+6
- $27