A pair of pants costs twice as much as a shirt. The total cost of 1

Question

1
pair of pants and 1
1
shirt is $18
$18
. If s represents the cost of 1
1
shirt, which equation could you use to find the cost of 1
1
shirt?

Answer 1

well,

p = 2s
p + s = 18

Now pick the equation which reflects those facts.

Answer 2

p=2s