15=t+4t

Solution for 15=t+4t equation:

Simplifying
15 = t + 4t

Combine like terms: t + 4t = 5t
15 = 5t

Solving
15 = 5t

Solving for variable 't'.

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

Add '-5t' to each side of the equation.
15 + -5t = 5t + -5t

Combine like terms: 5t + -5t = 0
15 + -5t = 0

Add '-15' to each side of the equation.
15 + -15 + -5t = 0 + -15

Combine like terms: 15 + -15 = 0
0 + -5t = 0 + -15
-5t = 0 + -15

Combine like terms: 0 + -15 = -15
-5t = -15

Divide each side by '-5'.
t = 3

Simplifying
t = 3