sarahlamar382 sarahlamar382
  • 03-12-2014
  • Mathematics
contestada

3x+4y=2 4x-4y=12 by using elimination

Respuesta :

lakwan007 lakwan007
  • 03-12-2014
(+3x+4y=2)
(+4x-4y=12)
-----------------
7x = 14
-----------------
7
X=2

3(2)+4y=2
6+4y=2
4y=-4
Y=-1.
Or you can plug x into the other equation.

4(2)-4y=12
8-4y=12
-4y=4
Y=-1.

Answer Link

Otras preguntas

solve for x 5(×+3)=4(×_3)​
In ancient egypt, a scribe equated the area of a circle with a diameter of 9 units to the area of a square with a side length of 8 units. what value of pi does
define the term ecology​
When given the information below, can you conclude that Quadrilateral WXYZ is a parallelogram? Why or why not? In Quadrilateral WXYZ, the sides have the followi
Please help me Solve this quadratic: 5x^2-20x+10=0
Effect: Jane fell down the stairs What’s the cause
4 A pendulum of mass 200 g is pulled horizontally sideways by 30 cm. The length of the pendulum string is 50 cm. a Calculate the potential energy of the pendulu
order from least to greatest? please​
Ella has 0.5 lbs of sugar. How much water should she add to make the following concentrations? Tell Ella how much syrup she will have in each case. 20% syrup?
in a game you pilot a spaceship and gain a point for every asteroid you destroy. the game ends when your ship is hit by an asteroid. you already have 39 point