72=a(-18+16)(-18+2)

Solution for 72=a(-18+16)(-18+2) equation:

Simplifying
72 = a(-18 + 16)(-18 + 2)

Combine like terms: -18 + 16 = -2
72 = a(-2)(-18 + 2)

Combine like terms: -18 + 2 = -16
72 = a * -2(-16)

Reorder the terms for easier multiplication:
72 = -2 * -16a

Multiply -2 * -16
72 = 32a

Solving
72 = 32a

Solving for variable 'a'.

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

Add '-32a' to each side of the equation.
72 + -32a = 32a + -32a

Combine like terms: 32a + -32a = 0
72 + -32a = 0

Add '-72' to each side of the equation.
72 + -72 + -32a = 0 + -72

Combine like terms: 72 + -72 = 0
0 + -32a = 0 + -72
-32a = 0 + -72

Combine like terms: 0 + -72 = -72
-32a = -72

Divide each side by '-32'.
a = 2.25

Simplifying
a = 2.25