Answer:7
Explanation:
Well we can make the red scarfs 12-x and the white scarfs x. Form this we can construct an equation:
(12-x)5+3x=50
By the way I multipled the amount of red scarfs by 5 becasue of it price and multipled the amount of white scarfs by 3, becasue again it is its price. Form this we get that x is equal to 5 and since the red scarfs is 12-x we can get that the red scarfs are 12-5 which is 7.