(18+t)(-3)+9=

Solution for (18+t)(-3)+9= equation:

Simplifying
(18 + t)(-3) + 9 = 0

Reorder the terms for easier multiplication:
-3(18 + t) + 9 = 0
(18 * -3 + t * -3) + 9 = 0
(-54 + -3t) + 9 = 0

Reorder the terms:
-54 + 9 + -3t = 0

Combine like terms: -54 + 9 = -45
-45 + -3t = 0

Solving
-45 + -3t = 0

Solving for variable 't'.

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

Add '45' to each side of the equation.
-45 + 45 + -3t = 0 + 45

Combine like terms: -45 + 45 = 0
0 + -3t = 0 + 45
-3t = 0 + 45

Combine like terms: 0 + 45 = 45
-3t = 45

Divide each side by '-3'.
t = -15

Simplifying
t = -15