Sal and two of his friends rent an apartment together. their total cost to move in included first month's rent, last month's rent and a security deposit of $1,200. if sal paid a total of $1,000 to move in, how much is his share of the rent each month? a. $300 b. $450 c. $600 d. $900

Option a. $300

Step-by-step explanation:

Let

x ----> the cost of the rent monthly per person

we know that

The number of persons is 3 (Sal and two friends)

The cost of the security deposit per person is equal to

If Sal paid a total of $1,000 to move in

then

That means that the cost per person of two months of rent (first and last month) plus $400 (security deposit per person) must be equal to $1,000

solve for x

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