Question

Sasha has 80 tomato plants and has room in her garden for r rows of plants. Which expression would she use to figure out how many plants need to go in each row?

Answer 1

Is it necessary for the rows to have the same number of plants?

Answer 2

she has room for "r" rows, and she needs to plant 80 plants, right ?
so in each row, she can put 80/r plants.

let x be the number of plants in each row, then the expression becomes :
x = 80/r