SOLUTION: Solve the following systems graphically and algebraically. -13x-15y = -31 -7x+9y = 137

Question 1199806: Solve the following systems graphically and algebraically.
-13x-15y = -31
-7x+9y = 137
Answer by ikleyn(52781)   (Show Source): You can put this solution on YOUR website!
.

A TWIN problem was solved for you today under this link

https://www.algebra.com/algebra/homework/Linear-equations/Linear-equations.faq.question.1199811.html

Solve the current problem in the same way.

---------------------

It looks like you need to learn (to get familiar with) the general theory/technique on solving systems of two equations in two unknown.

In this site I developed such lessons for beginner students. These lessons are
    - Solution of the linear system of two equations in two unknowns by the Substitution method
    - Solution of the linear system of two equations in two unknowns by the Elimination method
    - Solution of the linear system of two equations in two unknowns using determinant
    - Geometric interpretation of the linear system of two equations in two unknowns
    - Useful tricks when solving systems of 2 equations in 2 unknowns by the Substitution method

They give you the general theory and a lot of examples which you can consider as your TEMPLATES.

Consider these lessons as your textbook, your handbook, your guide and your (free of charge) home teacher.

Also, you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this online textbook under the topic "Systems of two linear equations in two unknowns".

Save the link to this online textbook together with its description

Free of charge online textbook in ALGEBRA-I
https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson

to your archive and use it when it is needed.

RELATED QUESTIONS
Solve the following systems graphically and algebraically. -17x+18y = 89 -18x-11y =... (answered by ankor@dixie-net.com)

Select the set of equations the represents the following situation: The cost of eight CDs (answered by Maths68)

choose the number solution to the following systems of equations. x+9y=9... (answered by MathLover1)

Solve the following LP problem graphically: Minimize cost = 24X + 15Y Subject to: 7X +... (answered by Fombitz)

If i was given this problem to solve algebraically --> 8x + 5y = 6 (answered by unlockmath)

The directions of the problem is "solve,then check algebraically and graphically." The... (answered by stanbon)

Solve the following systems using Elimination -4x-15y=-17 -x+5y= -13 (answered by MathLover1)

solve the following systems x − 2y = 6 −7.5x + 15y =... (answered by josgarithmetic)

solve the following equations; 3x+2y+7=0 6x+4y-8=0, a. algebraically b.... (answered by mananth)