(t+9)+(4t-15)=

Solution for (t+9)+(4t-15)= equation:

Simplifying
(t + 9) + (4t + -15) = 0

Reorder the terms:
(9 + t) + (4t + -15) = 0

Remove parenthesis around (9 + t)
9 + t + (4t + -15) = 0

Reorder the terms:
9 + t + (-15 + 4t) = 0

Remove parenthesis around (-15 + 4t)
9 + t + -15 + 4t = 0

Reorder the terms:
9 + -15 + t + 4t = 0

Combine like terms: 9 + -15 = -6
-6 + t + 4t = 0

Combine like terms: t + 4t = 5t
-6 + 5t = 0

Solving
-6 + 5t = 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 + 5t = 0 + 6

Combine like terms: -6 + 6 = 0
0 + 5t = 0 + 6
5t = 0 + 6

Combine like terms: 0 + 6 = 6
5t = 6

Divide each side by '5'.
t = 1.2

Simplifying
t = 1.2