114k views
2 votes
A student bought a calculator and a textbook for a course in algebra

A student bought a calculator and a textbook for a course in algebra-example-1

1 Answer

0 votes

To solve the system by substitution, first, we substitute the second equation in the first one and get:


4y+20+y=145.

Adding like terms we get:


5y+20=145.

Subtracting 20 from the above equation, we get:


5y=145-20=125.

Dividing by 5, we get:


y=25.

Substituting y=25 in the second equation of the system, we get:


x=4(25)+20.

Simplifying the above result, we get:


x=100+20=120.

Answer:


(120,25)\text{.}

User Dreamlab
by
8.2k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories