Respuesta :
Use the elimination method:
-4x - 2y = -12
+4x + 8y = -12
--------------------
0 + 6y = -24
6y = -24
6y/6 = -24/6
y = -4
Plug in -4 for y in one of the equations
-4x - 2y = -12
-4x - 2(-4) = -12
-4x + 8 = -12
-4x + 8 (-8) = -12 (-8)
-4x = -20
-4x/-4 = -20/-4
x = 5
x = 5, y = -4
hope this helps
-4x - 2y = -12
+4x + 8y = -12
--------------------
0 + 6y = -24
6y = -24
6y/6 = -24/6
y = -4
Plug in -4 for y in one of the equations
-4x - 2y = -12
-4x - 2(-4) = -12
-4x + 8 = -12
-4x + 8 (-8) = -12 (-8)
-4x = -20
-4x/-4 = -20/-4
x = 5
x = 5, y = -4
hope this helps
elimination method is best because one equation has 4x and the other has -4x. Add the two equations together.
-4x - 2y = -12
+4x + 8y = -24
----------------------
0 + 6y = - 36
divide by 6 both sides
y = -6
use this to find x in either equation.
4x + 8(-6) = -24
4x - 48 = -24
4x = -24 + 48
4x = 24
x = 6
-4x - 2y = -12
+4x + 8y = -24
----------------------
0 + 6y = - 36
divide by 6 both sides
y = -6
use this to find x in either equation.
4x + 8(-6) = -24
4x - 48 = -24
4x = -24 + 48
4x = 24
x = 6