7 friends have a similar cell phone plans. The price of each plan is $x. 3 of 7 friends pay an extra $4 per month for unlimited text messaging write and simplify an expression that represents the total cost of 7 plans

Step-by-step explanation:

7 friends have a similar cell phone plans. The price of each plan is $x. This means that the basic cost of all the plans is $x. The total basic cost for the 7 plans would be

7 * x = $7x

3 of 7 friends pay an extra $4 per month for unlimited text messaging. The total amount paid by the 3 friends would be

3 * 4 = $12

Therefore, the total cost for the 7 plans would be

7x + 12