Answer:
7.90x + 2 = 160
He bought 20 shirts.
Step-by-step explanation:
We want to create an equation, with x representing the number of shirts he bought.
We know it will equal $160, because he paid $160;
= 160
$2 is the flat rate, so we need to add it;
2+ __ = 160
$7.90 is the cost per shirt, so we multiply it by x and add it;
2 + 7.90x = 160
7.90x = 160-2
7.90x = 158
x = 20 shirts
