Mia planted 5 rows of tomatoe plants with (t) plants in each row and had 8 plants left over. how many plants did mia begin with before she started to plant?

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Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.

What is the value of x when x + 7 = 21?