Pair of linear equations in One Variable

Champa went to a ‘Sale’ to purchase some pants and skirts. When her
friends asked her how many of each she had bought, she answered, “The number of
skirts is two less than twice the number of pants purchased. Also, the number of skirts
is four less than four times the number of pants purchased”. Help her friends to find
how many pants and skirts Champa bought.