Write an algebraic equation for the following problem and then solve it. The population of a country in 2015 was estimated to be 321.2 million people. This was an increase of 23% from the population in 1990. What was the population of the country in 1990?

Write an algebraic equation for the following problem and then solve it. The population of a country in 2015 was estimated to be 321.2 million people. This was an increase of 23% from the population in 1990. What was the population of the country in 1990?

Algebra and Trigonometry (6th Edition)

6th Edition

ISBN:9780134463216

Author:Robert F. Blitzer

Publisher:Robert F. Blitzer

ChapterP: Prerequisites: Fundamental Concepts Of Algebra

Section: Chapter Questions

Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...

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Question

0 of 1
Write an algebraic equation for the
following problem and then solve it.
The population of a country in 2015 was
estimated to be 321.2 million people.
This was an increase of 23% from the
population in 1990. What was the
population of the country in 1990?
The algebraic equation is=321.2.
(Type an expression using x as the
variable. Use integers or decimals for
any numbers in the expression. Do

Expert Solution

Step 1

NOTE: Refresh your page if you can't see any equations.

x=population of the country in 1990

and in 2015, the population of the country was 321.2

this was an increase of 23% from the population in 1990

so we can write

$x+23\%\:\:of\:\:x=321.2$

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