Respuesta :

bcalle
x + 3y = 9
3x - 3y = -13
---------------------  add the equations
4x  = -4
divide both sides by 4
x = -1

plug -1 back into either equation and solve for 'y'.
x + 3y = 9
-1 + 3y = 9
add 1 to both sides
3y = 10
divide both sides by 3
y = 10/3 or y = 3 1/3

(-1, 10/3), OR (-1, 3 1/3)

The given equations are x + 3y = 9, 3x - 3y = -13. the value of x and y are -1 and  3 1/3.

What is a system of equations?

A system of equations is two or more equations that can be solved to get a unique solution. the power of the equation must be in one degree.

The given equations are

x + 3y = 9

3x - 3y = -13

add the equations

4x  = -4

x = -1

To solve for y

x + 3y = 9

-1 + 3y = 9

by adding 1 to both sides

3y = 10

y = 10/3

or y = 3 1/3

Learn more about equations here;

https://brainly.com/question/10413253

#SPJ2

Otras preguntas