Alyyyyyyy
Alyyyyyyy Alyyyyyyy
  • 01-12-2015
  • Mathematics
contestada

solve for x and y
-2x-y=-9
5x-2y=-9

Respuesta :

taskmasters
taskmasters taskmasters
  • 01-12-2015

we use equation 1 first.
-2x -y = -9 

 -y = -9 + 2x

y = 9 -2x

We substitute value of y in equation 2

5x - 2 (9 - 2x) = -9

5x -18 - 4x = -9

5x - 4x = -9 + 18

x = 18 -9

x = 9

We now find the value of y

-2x -y = -9

-2 (9) - y = -9

-18 - y = -9

-y = -9 + 18

y = 9 - 18

y = -9





Answer Link

Otras preguntas

Why would William howard taft be considered a trustbuster
Why do you think the mean and median are called “measures of center”
identify the type of sentence josh and i are meeting for pizza at noon today
The primary reason Japanese-Americans were targeted for internment in 1941 was? A. the Japanese bombing of Pearl Harbor b. Japan's strategic location in the
If the radius of a circle is 14 ft, then the diameter of the circle is _____. A.) 7 ft B.) 28 ft C.) 42 ft D.) 87.92 ft
How can imagery be used in a speech ? A. to organize ideas B. to inspire the audience C. to provide evidence D. to project confidence
congress's adoption of the declaration of independence confirmed a decisive shift in the conflict between the colonies and Britain. why did the colonies make th
veveref7fois7dgfl eeufhwieguwegfwgwegf
Lionel is planning a one-day outing
A student placed a pencil in a cup of water. The pencil appears broken because light- always travels in a straight line makes the water in the glass e