To represent the situation with a two-variable equation, we first need to define the variables:

Question

Let:
- \( h \) = the number of hard cover books
- \( s \) = the number of soft cover books

The cost of hard cover books is $2.00 each, and the cost of soft cover books is $1.00 each. Santiago spends a total of $30 on these books.

The equation representing the total cost is:

\[ 2h + 1s = 30 \]

This equation states that the total cost of the hard cover books (2 times the number of hard cover books) plus the total cost of the soft cover books (1 times the number of soft cover books) equals $30.
make this like a 9th grader wote it

Answer 1

Sure! Here’s a simpler version that sounds like a 9th grader wrote it:

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Let's say:

• \( h \) is the number of hard cover books.
• \( s \) is the number of soft cover books.

Hard cover books cost $2.00 each, and soft cover books cost $1.00 each. Santiago spends a total of $30 on these books.

So, we can write an equation to show this. The equation is:

\[ 2h + 1s = 30 \]

This means that if you take the number of hard cover books (\( h \)) and multiply it by $2 (because they cost $2 each), and then add that to the number of soft cover books (\( s \)) multiplied by $1 (since they cost $1 each), the total has to equal $30.

That's how we can use this equation to figure out how many books Santiago bought!