Question
Eric folded 19 paper swans on the first day. Each day he did 4 more paper swans than the previous day. On the last day, he made 55 swans. How many days did he fold paper swans?
2 m

Click button first when a symbol is required. X

Eric folded 19 paper swans on the first day. Each day he did 4 more paper swans than the previous day. On the last day, he made 55 swans. How many days did he fold paper swans?