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

Question

03-11-2017
Mathematics

contestada

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

Respuesta :

Otras preguntas

what do this mean explain the following thoughts of annemarie, "it was hard for the ones who were waiting, Annemarie knew. Less dangerous perhaps but more fear

determine whether each expression is meaningful as a real number yes or no? -√9

why did the citizens of Richmond, Virginia feel upset about the actions at Fort Sumter ?

Can someone help me please got to be in tomorrow

What Is the Function of Alliteration in Literature?

se quiere embotellar 43,5 litros de leche en botellas de 0,750 de litro ¿cuantas botellas se necesitan?

Which sentence uses a verb that agrees with its subject?A.In a dark corner of the attic were many unopened boxes.B.Across the surface of the water glides swans.

@stewyWhich sentence uses a verb that agrees with its compound subject? A.Waiters and waitresses serve the diners at the banquet.B.cell phones and tablets i

What what handels full name

Аноним Аноним · Answer 1 · 2017-11-03T15:34:27+01:00

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