9+t+3(t+3)=

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

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

Reorder the terms:
9 + t + 3(3 + t) = 0
9 + t + (3 * 3 + t * 3) = 0
9 + t + (9 + 3t) = 0

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

Combine like terms: 9 + 9 = 18
18 + t + 3t = 0

Combine like terms: t + 3t = 4t
18 + 4t = 0

Solving
18 + 4t = 0

Solving for variable 't'.

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

Add '-18' to each side of the equation.
18 + -18 + 4t = 0 + -18

Combine like terms: 18 + -18 = 0
0 + 4t = 0 + -18
4t = 0 + -18

Combine like terms: 0 + -18 = -18
4t = -18

Divide each side by '4'.
t = -4.5

Simplifying
t = -4.5