-a=-y(x-2)(x-12)

Solution for -a=-y(x-2)(x-12) equation:

Simplifying
-1a = -1y(x + -2)(x + -12)

Reorder the terms:
-1a = -1y(-2 + x)(x + -12)

Reorder the terms:
-1a = -1y(-2 + x)(-12 + x)

Multiply (-2 + x) * (-12 + x)
-1a = -1y(-2(-12 + x) + x(-12 + x))
-1a = -1y((-12 * -2 + x * -2) + x(-12 + x))
-1a = -1y((24 + -2x) + x(-12 + x))
-1a = -1y(24 + -2x + (-12 * x + x * x))
-1a = -1y(24 + -2x + (-12x + x2))

Combine like terms: -2x + -12x = -14x
-1a = -1y(24 + -14x + x2)
-1a = (24 * -1y + -14x * -1y + x2 * -1y)

Reorder the terms:
-1a = (14xy + -1x2y + -24y)
-1a = (14xy + -1x2y + -24y)

Solving
-1a = 14xy + -1x2y + -24y

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Divide each side by '-1'.
a = -14xy + x2y + 24y

Simplifying
a = -14xy + x2y + 24y