Answer:
m - 7.50 = 12.50
and
m = 7.50 + 12.50
Explanation:
The best answers would be:
m - 7.50 = 12.50
and
m = 7.50 + 12.50
First of all, let's figure out what the question is asking us:
The question is asking us to find the amount of money on the gift card
It tells us to use "m" for "the amount of money on the gift card"
Now that we know the following, we can put together the equation
m = the amount of money on the gift card
$7.50 = cost of the book
$12.50 = amount remaining
Since he receives the gift card and then buys a book that costs $7.50, we are going to "have to subtract $7.50 from m". And we know that $12.50 is remaining, so we "make the equation equal to 12.50".
So, let's set up the equation:
m - 7.50 = 12.50
Now that we know the equation, we can solve for "m"
m - 7.50 = 12.50
Step 1: Add 7.50 to both sides.
m − 7.50 7.50 = 12.50 + 7.50
Step 2: Simplify
Answer: m = 20
Another way you can set up this equation is:
m = 7.50 + 12.50
Because we want to find "m", we set it equal to the equation. Since Salim bought a book for $7.50 and had $12.50 remaining, we want to find how much he had on the gift card that made him have $12.50 remaining when he bought the book. So, we have to add 7.50 and 12.50, to find how much is on the gift card.
So, the equation "m = 7.50 + 12.50", makes sense when solving for "m"
Hint: Once you have realized that the equation has Like Terms on the same side you must Combine the Like Terms by either adding them together or subtracting them.
Now that we know the equation, let's solve it
m = 7.50 + 12.50
Step 1: Combine like terms
m = (7.50 + 12.50)
m = 20
Since both equations equal $20 and both make sense, we can conclude that these are the best options.