90+(t+10.5)+t=180

Solution for 90+(t+10.5)+t=180 equation:

Simplifying
90 + (t + 10.5) + t = 180

Reorder the terms:
90 + (10.5 + t) + t = 180

Remove parenthesis around (10.5 + t)
90 + 10.5 + t + t = 180

Combine like terms: 90 + 10.5 = 100.5
100.5 + t + t = 180

Combine like terms: t + t = 2t
100.5 + 2t = 180

Solving
100.5 + 2t = 180

Solving for variable 't'.

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

Add '-100.5' to each side of the equation.
100.5 + -100.5 + 2t = 180 + -100.5

Combine like terms: 100.5 + -100.5 = 0.0
0.0 + 2t = 180 + -100.5
2t = 180 + -100.5

Combine like terms: 180 + -100.5 = 79.5
2t = 79.5

Divide each side by '2'.
t = 39.75

Simplifying
t = 39.75