12=t+3t

Solution for 12=t+3t equation:

Simplifying
12 = t + 3t

Combine like terms: t + 3t = 4t
12 = 4t

Solving
12 = 4t

Solving for variable 't'.

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

Add '-4t' to each side of the equation.
12 + -4t = 4t + -4t

Combine like terms: 4t + -4t = 0
12 + -4t = 0

Add '-12' to each side of the equation.
12 + -12 + -4t = 0 + -12

Combine like terms: 12 + -12 = 0
0 + -4t = 0 + -12
-4t = 0 + -12

Combine like terms: 0 + -12 = -12
-4t = -12

Divide each side by '-4'.
t = 3

Simplifying
t = 3