Hello, fdrhs1984!

I'll baby-step through the reasoning . . .

The manager at Cream of the Crop bought a load of watermelons for $180.

She priced the melons so that she would make $1.50 profit on each melon.

When all but 20 had been sold, the manager had recovered her initial investment.

How many did she buy originally?

She bought watermelons for $180.

The watermelons cost: . dollars each.

For a $1.50 profit, she sold them at: . dollars each.

She sold watermelons and took in $180.

There is the equation! . . . . .180 . . . . That's better!

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

Expand: .

Multiply by

Therefore: . She bought 60 watermelons.

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

Check

She bought 60 watermelon for $180.

. . They cost: . each.

She charged: . for each watermelon.

Then she sold watermelons

. . and took in: . (her initial investment)

Nailed it!