t+(t+10)+(t+20)=180

Solution for t+(t+10)+(t+20)=180 equation:

Simplifying
t + (t + 10) + (t + 20) = 180

Reorder the terms:
t + (10 + t) + (t + 20) = 180

Remove parenthesis around (10 + t)
t + 10 + t + (t + 20) = 180

Reorder the terms:
t + 10 + t + (20 + t) = 180

Remove parenthesis around (20 + t)
t + 10 + t + 20 + t = 180

Reorder the terms:
10 + 20 + t + t + t = 180

Combine like terms: 10 + 20 = 30
30 + t + t + t = 180

Combine like terms: t + t = 2t
30 + 2t + t = 180

Combine like terms: 2t + t = 3t
30 + 3t = 180

Solving
30 + 3t = 180

Solving for variable 't'.

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

Add '-30' to each side of the equation.
30 + -30 + 3t = 180 + -30

Combine like terms: 30 + -30 = 0
0 + 3t = 180 + -30
3t = 180 + -30

Combine like terms: 180 + -30 = 150
3t = 150

Divide each side by '3'.
t = 50

Simplifying
t = 50