2t+5+t-17+t-20=18

Solution for 2t+5+t-17+t-20=18 equation:

Simplifying
2t + 5 + t + -17 + t + -20 = 18

Reorder the terms:
5 + -17 + -20 + 2t + t + t = 18

Combine like terms: 5 + -17 = -12
-12 + -20 + 2t + t + t = 18

Combine like terms: -12 + -20 = -32
-32 + 2t + t + t = 18

Combine like terms: 2t + t = 3t
-32 + 3t + t = 18

Combine like terms: 3t + t = 4t
-32 + 4t = 18

Solving
-32 + 4t = 18

Solving for variable 't'.

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

Add '32' to each side of the equation.
-32 + 32 + 4t = 18 + 32

Combine like terms: -32 + 32 = 0
0 + 4t = 18 + 32
4t = 18 + 32

Combine like terms: 18 + 32 = 50
4t = 50

Divide each side by '4'.
t = 12.5

Simplifying
t = 12.5