Xanderr Xanderr

02-10-2020
Mathematics

contestada

Plz help me.
Solve the system of linear equations by substitution
X+y=-7
-5x+y=5

Respuesta :

jennyzhang096 jennyzhang096

05-10-2020

Answer:

x= -2 y= -5

Step-by-step explanation:

X+y=-7

x+-y-7

-5(-y-7)+y=5

5y+35+y=5

6y+35=5

6y=5-s5

6y=-30

y=-5

-5x+(-5)=5

-5x=5+5

-5x=10

x=-2

Answer Link

Otras preguntas

identify the importance of school for students and teach.Justify your answer using examples from the text

In the figure below, if arc XY measures 120 degrees, what is the measure of angle ZYX?

What is the value of x after the following statements execute? int x, y, z; y 12; z 3; X= (y*(z+y-10); A. 36 B. 144 C.60 D. None of these

A man uses a loan program for small businesses to obtain a loan to help expand his vending machine business. The man borrows $26 comma 000 for 4 years with a s

A car initially contains just its driver. The combined mass of car and driver is 869 kg. When the gas pedal is pushed down all the way, the car reaches its maxi

A fish whose streamlined body enables it to move easily in a current is most likely adapted to which aquatic ecosystem? ponds rivers lakes wetlands

In the figure below, segments YZ and XY are both segments that are tangent to circle E. Segments XY and YZ are congruent.

Two subway stops are separated by 1.1 km. If a subway train accelerates at +1.2 m/s2 from rest through the first half of the distance and decelerates at −1.2 m

Evaluate the following expression when x = 5 and z = 3.z-3x=

Which of these countries has the most coastline?