cordeszcoleot8mnh cordeszcoleot8mnh
  • 25-07-2017
  • Mathematics
contestada

find the solution of -x+5y=-18 5x-9y=10

Respuesta :

choixongdong
choixongdong choixongdong
  • 25-07-2017
-x + 5y= -18 so x = 5y + 18
5x-9y=10
substitute 
x = 5y + 18 into 5x - 9y = 10

5x - 9y = 10
5(5y + 18) - 9y = 10
25y + 90 - 9y = 10
16y = - 80
 y = -5

x = 5y + 18
x = 5(-5) + 18
x = -25 + 18
x = -7

answer
(-7, -5)


Answer Link

Otras preguntas

What was the United States’ principal use of Guam in the late 19th century and early 20th century? as a location for U.S. owned tropical fruit farms as a source
what is the possessive form of "ship"?
Who were known as "carpetbaggers" and "scalawags"? Northern confederates who tried to take over Southern lands and businesses after the war Northerners who trie
What factor was important for the creation and maintenance of the Pax Romana?
Which of these scenarios would be considered illegal in light of the provisions of the Fourteenth Amendment? (A) Native American men were not permitted to vote
what does an ecopsychologist study?
One angle in a triangle has a measure that is three times as large as the smallest angle. The measure of the third angle is 35 degrees more than that of the sma
How did some Puritans deal with the uncertainty of divine election? They created elaborate, ceremonial worship. They placed an emphasis on the conversion experi
The plentiful food production brought about by farming along the Tigris and Euphrates Rivers allowed Mesopotamian villages and towns to develop into city-states
what is 1/10 of 1,700,000 square feet