Caleb is thinking of two numbers between 1 and 20 whose sum is 17 and whose differences is 7.find the numbers

if im not mistaking its

step-by-step explanation:  

this excerpt is taken from the book “we shall not be moved : the women’s factory strike of 1909 “ and is written by joan dash. it is the story of the great strike when almost 30thousand women working in factories in america formed a union to fight unsafe working conditions, long working hours and miserable wages.

question: which best states the author’s purpose for including this information in the text?

answer: to challenge the reader’s ideas about a historical event