180=90+2t+(t+10.5)

Solution for 180=90+2t+(t+10.5) equation:

Simplifying
180 = 90 + 2t + (t + 10.5)

Reorder the terms:
180 = 90 + 2t + (10.5 + t)

Remove parenthesis around (10.5 + t)
180 = 90 + 2t + 10.5 + t

Reorder the terms:
180 = 90 + 10.5 + 2t + t

Combine like terms: 90 + 10.5 = 100.5
180 = 100.5 + 2t + t

Combine like terms: 2t + t = 3t
180 = 100.5 + 3t

Solving
180 = 100.5 + 3t

Solving for variable 't'.

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

Add '-3t' to each side of the equation.
180 + -3t = 100.5 + 3t + -3t

Combine like terms: 3t + -3t = 0
180 + -3t = 100.5 + 0
180 + -3t = 100.5

Add '-180' to each side of the equation.
180 + -180 + -3t = 100.5 + -180

Combine like terms: 180 + -180 = 0
0 + -3t = 100.5 + -180
-3t = 100.5 + -180

Combine like terms: 100.5 + -180 = -79.5
-3t = -79.5

Divide each side by '-3'.
t = 26.5

Simplifying
t = 26.5