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

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

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

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

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

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

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

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

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

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

Solving
30 + 2t = t

Solving for variable 't'.

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

Add '-1t' to each side of the equation.
30 + 2t + -1t = t + -1t

Combine like terms: 2t + -1t = 1t
30 + 1t = t + -1t

Combine like terms: t + -1t = 0
30 + 1t = 0

Add '-30' to each side of the equation.
30 + -30 + 1t = 0 + -30

Combine like terms: 30 + -30 = 0
0 + 1t = 0 + -30
1t = 0 + -30

Combine like terms: 0 + -30 = -30
1t = -30

Divide each side by '1'.
t = -30

Simplifying
t = -30