queenzoe20 queenzoe20
  • 03-11-2017
  • Mathematics
contestada

Solve the system of equations 3y + 2z = 12 and y – z = 9

Respuesta :

Аноним Аноним
  • 03-11-2017
mulitply second equation by 2 and add to first

3y+2z=12
2y-2z=18 +
5y+0z=30

5y=30
divide 5
y=6

sub back
y-z=9
6-z=9
minus 6
-z=3
times -1
z=--3

x=-3
y=6
Answer Link

Otras preguntas

At what time do many spanish people eat dinner (La cena)?
When do people from mexico usually arrive for social events?
Read Romeo’s comment after killing Tybalt in Act III, scene i of Romeo and Juliet. Romeo: O! I am Fortune’s fool. Romeo’s statement foreshadows the fact that Ro
What does it mean when we say that the tails of the normal curve are asymptotic to the x axis?
As joint activity increases, the viscosity of synovial fluid will _____.
find the slope of the line (-1,9) (9,9)
A bicyclist travels 1 mile in 5 minutes. If m represents minutes, what does the expression m over 5 represent
What is the solution to this system of linear equations? y − 4x = 7 2y + 4x = 2 (3, 1) (1, 3) (3, −1) (−1, 3)
The united states features a number of different _____ due to its diversity.
Factor the following equation: 4x^2 – 81