Kelsey can buy 2 pounds of apples for 7$. Write an equation to represent the cost, c, for a, pounds of apples.

First, we need to find how much a single pound of apples costs.

Do this by dividing.

Now, write an equation.

This represents that the cost equals 3.5 times the number of apples.

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^