Hi. So i am confused on this method invented that i have to solve systems of equations with some cross out method that makes 0 sense.
Here is the problem
-4x-2y=-12 (BUT)
4x+8y=-24.
Can someone please help?
-4x - 2y = -12
4x + 8y = -24
If you add down the individual columns, all the x-terms will disappear:
6y = -36
Now, divide by 6 ---> y = -6
Replace this back into either of the two original equations; if you use the second equation:
4x + 8y = -24 ---> 4x + 8(-6) = -24 ---> 4x - 48 = -24
add 48 to both sides: 4x = 24
divide by 4: x = 6