Question

Karen and Kevin collect coins. Karen has x coins. Kevin has 9 coins fewer than four times the number of coins Karen has. Write and simplify an expression for the total number of coins Karen and Kevin have. Karen and Kevin have coins. (Simplify your answer.)

Answer 1

Karen has x coins

Kevin has 4x-9 (9 coins fewer than four times the number of coins Karen has)

Total number of coins = x + (4x-9)

`\text{Total \# coins=}x+4x-9=5x-9`

The expression for the total number of coins Karen and Kevin have is 5x - 9