t-(5+2t)+(t-7)=

Solution for t-(5+2t)+(t-7)= equation:

Simplifying
t + -1(5 + 2t) + (t + -7) = 0
t + (5 * -1 + 2t * -1) + (t + -7) = 0
t + (-5 + -2t) + (t + -7) = 0

Reorder the terms:
t + -5 + -2t + (-7 + t) = 0

Remove parenthesis around (-7 + t)
t + -5 + -2t + -7 + t = 0

Reorder the terms:
-5 + -7 + t + -2t + t = 0

Combine like terms: -5 + -7 = -12
-12 + t + -2t + t = 0

Combine like terms: t + -2t = -1t
-12 + -1t + t = 0

Combine like terms: -1t + t = 0
-12 + 0 = 0
-12 = 0

Solving
-12 = 0

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.