Question

Sweater costs $12 more than twice the cost of a skirt. The sweater costs $38. How do you find the cost of the skirt?

Answer 1

`$13`

Explanation:

Let's translate the first sentence to a formula:

"Sweater costs..." `\to s`
"...`12` more than..." `\to 12+...`
"...twice..." `\to 2\cdot...`
"...the cost of a skirt" `\to k`

So, the equation is

`s = 12+2k`

Since `s=38`, we have, solving for `k`,

`38 = 12+2k \iff 38-12 = 2k \iff 26 = 2k \iff k = 13`