03-06-2015
Mathematics

contestada

−4x + y = 6
−5x − y = 21

Respuesta :

apologiabiology apologiabiology

03-06-2015

assuming x=x and y=y in both equations
add them together

-4x+y=6
-5x-y=21 +
-9x+0y=27
-9x=27
divide by 9
-x=3
multiply -1
x=-3

subsiutte
-4x+y=6
-4(-3)+y=6
12+y=6
subtract 12
y=-6

x=-3
y=-6
the soultion set is in (x,y) form
(-3,-6)

Answer Link

Otras preguntas

how do solve you do 5b/2=27.5

What Name was given to military expeditions to the Holy Land

Which of the following statements about the lifestyle of the Mongols is false?They farmed along fertile river valleys. They were pastoralists, relying on

What 40-day period precedes Easter?

. Determine whether the polynomial is a perfect square and if it is, factor it. n^2 – 9n + 9 is not a perfect square is a perfect square: (n + 3)^

What word best describes the twelve years of presidential power before Bill Clinton was elected? A. Conservative B. Democratic C. Independent D. Liberal

when was the french second republic set up and how were legislators elected

Which of these fields was the “Lost Generation” associated with? music movies literature science

Which country represented a personal failure to President Clinton after turbulent events in that country unfolded? Afghanistan China Ireland Rwanda

Dena is biking down a 9/10 mile bike trail. She stops to greet a friend after biking 1/3 of a mile. How much farther does she need to travel?