12-(-3t)+6t-18=

Solution for 12-(-3t)+6t-18= equation:

Simplifying
12 + -1(-3t) + 6t + -18 = 0

Remove parenthesis around (-3t)
12 + -1 * -3t + 6t + -18 = 0

Multiply -1 * -3
12 + 3t + 6t + -18 = 0

Reorder the terms:
12 + -18 + 3t + 6t = 0

Combine like terms: 12 + -18 = -6
-6 + 3t + 6t = 0

Combine like terms: 3t + 6t = 9t
-6 + 9t = 0

Solving
-6 + 9t = 0

Solving for variable 't'.

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

Add '6' to each side of the equation.
-6 + 6 + 9t = 0 + 6

Combine like terms: -6 + 6 = 0
0 + 9t = 0 + 6
9t = 0 + 6

Combine like terms: 0 + 6 = 6
9t = 6

Divide each side by '9'.
t = 0.6666666667

Simplifying
t = 0.6666666667