Question

What is `2m+7m`?

Answer 1

`2m + 5 m = 7m`

Explanation:

`2m` means (`2xxm`)
One way to think of this is having
`color(white)("XXXX")`2 rows each with the same number of monkeys
`color(white)("XXXX")` `color(white)("XXXX")`(we're not sure of the exact number of monkeys in each row,
`color(white)("XXXX")` `color(white)("XXXX")`but we can see that there are the same number
`color(white)("XXXX")` `color(white)("XXXX")`and for convenience we will call this number `m`)

Similarly `5m` means (`5xxm`)
And we can think of this in the same terms as `2m`
`color(white)("XXXX")`5 rows each with the same number of monkeys (and the same number of monkeys as in the 2 rows)

If we add 2 rows of monkeys and 5 rows of monkeys
we get 7 rows of monkeys (each row with `m` monkeys)

We can write this in symbols as
`color(white)("XXXX")` `2m + 5m = 7m`