you are having a garage sale. At Lowe's, a cash box cost $10 and for sale signs cost $7 each. You spent a total of $38 before taxes. How many for sale signs did you buy in addition to the cash box?

4 sales signs

Step-by-step explanation:

7x + 10 = 38

Subtract 10

7x = 28

Divide 4

x = 4

4 signs

Step-by-step explanation:

The total amount you spent is ...

cash box cost + sign cost = total amount

You are told the cash box costs $10, the signs are $7 each, and the total is $38. If n is the number of signs, then the total amount is ...

$10 + $7 * n = $38

Subtracting the cost of the cash box gives the amount you spent on signs:

7n = 28

Dividing by 7 gives the number of signs:

28/7 = n = 4

You bought 4 signs.