I'm assuming that your solving for X. 21x + 12x - 2 = 0 33x - 2 = 0 33x = 2 x = 2/33 x =.06
It is an equation.
9x + 2 = 12x + 14 -3x = 12 x = -4
10+12x=-14 -14-10=12x 12x=-24 x=-2
x2+12x+5 = 3 x2+12x+5-3 = 0 x2+12x+2 = 0
12x - 6 = 10x +2 12x - 10x = 2 + 6 2x = 8 x = 4
2*2 - 12x +16 =0 4 - 12x +16 =0 -12x + 16 +4 =0 -12x + 20 =0 -12x = -20 x = 1.666666667
5x-3 = 11+12x 5x-12x = 11+3 -7x = 14 x = -2
12x - 9y = 6, 12x + 20y = 64 29y = 58 y = 2 x = 2
The answer to the problem of 12X plus 13 equals 9 is x equals -1/3.
It is: 122-4*(9*-2) = 216
-2