Mathematics: The sum of two numbers is 80 and the difference of the same two numbers is 42.5. find the numbers.

The sum of two numbers is 80 and the difference

Ответ:

carrie85

13.03.2022

A, b - the numbers
$\underline{\left\{\begin{array}{ccc}a+b=80\\a-b=42.5\end{array}\right}\ \text{add the both sides of the equation}\\.\ \ \ \ \ 2a=122.5\ \ \ \ |:2\\.\ \ \ \ \ \ a=61.25\\\\\text{substitute to first equation}\\\\61.25+b=80\ \ \ |-61.25\\b=18.75$
61.25 and 18.75.

0,0(0 оценок)

Ответ:

keirarae2005

15.06.2021

Mathematics

I need to see the image to answer

0,0(0 оценок)

The sum of two numbers is 80 and the difference of the same two numbers is 42.5. find the numbers.

Ответ:

Ответ:

Ask your question to the AI advisor

More tips

Answers on questions: Mathematics

Ask an AI advisor a question