I'm really not sure what your asking, but if your trying to solve for x it should be basic algebra.
12+x=-2
12+x-12=-2-12 subtract 12 from both sides
x=-14
12+(-14)=-2
Is this what you're after? if not could you be a little more specific?
x = 4
X=1.42857142857143
4 x 2 + 4 = 12 x = 4
5x + 2 = x + 12 5x - x = 12 - 2 4x = 10 x = 10/4 x = 5/2 or 2.5
The slope of -x plus 6y is equals to 12 is said to be (2 + 1/6x).
so 3x + 2 = x + 12 ie 2x = 10 x =5
2+x-4 = 12 x = 12+4-2 x = 14
x = 12
x=12 because 12 over 6 is 2,and 2 plus 4 is 6.
-10
The value of x is 10
x = 4
-26
X=1.42857142857143
4 x 2 + 4 = 12 x = 4
x=2
X=2