SOLUTION: I need help on figuring out how to find the equation and solving it to get the answer. The problem is: Abraham Lincoln's 1863 Gettsyburg Address refers to the year 1776 as "four sc

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Question 102639This question is from textbook algebra 1
: I need help on figuring out how to find the equation and solving it to get the answer. The problem is: Abraham Lincoln's 1863 Gettsyburg Address refers to the year 1776 as "four score and seven years ago." Write an equation and solve for a score. This question is from textbook algebra 1

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Let s=how many years there are in a score


First find the difference between 1863 and 1776

1863-1776=87


So four-score and 7 years is 87 years


So when you say "four-score", you're saying 4s and when you add "..and 7 years" you're adding 7 to 4s to get:


4s%2B7


So this means the expression is equal to 87


4s%2B7=87



4s=87-7Subtract 7 from both sides


4s=80 Combine like terms on the right side


s=%2880%29%2F%284%29 Divide both sides by 4 to isolate s



s=20 Divide

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Answer:
So our answer is s=20


So this means a score is 20 years