Question

A comic costs $3 and a mystery series costs $5 each.If Ken spend all his money on the comics, he has $6 left. If he wants to buy the mystery series, he needs another $8. How many comics or mystery books is Ken buying? How much money does he have?

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Answer 1

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

Answer 2

7 books

$27

Explanation:

3x + 6= 5x - 8

3x - 5x = -14

-2x= -14

x= 7 books

he has (3×7)+6= $27