Question

A pack of cardinal flower seeds costs $4 and a pack of petunia flower seeds costs $2.50, You buy the same number of packs of each type of flower and spend $39. How many packs of each do you buy?

Answer 1

I buy `6` packs of each type of seeds.

Explanation:

I buy the same number of packs of each type of seeds
I buy `x` packs of each type of seeds.
Then -

`(x xx 4)+x xx 2.50)=$39`
`4x+2.5x=39`
`6.5x=39`
`x=39/6.5=6` packs