t+(t-15)=70

Solution for t+(t-15)=70 equation:

Simplifying
t + (t + -15) = 70

Reorder the terms:
t + (-15 + t) = 70

Remove parenthesis around (-15 + t)
t + -15 + t = 70

Reorder the terms:
-15 + t + t = 70

Combine like terms: t + t = 2t
-15 + 2t = 70

Solving
-15 + 2t = 70

Solving for variable 't'.

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

Add '15' to each side of the equation.
-15 + 15 + 2t = 70 + 15

Combine like terms: -15 + 15 = 0
0 + 2t = 70 + 15
2t = 70 + 15

Combine like terms: 70 + 15 = 85
2t = 85

Divide each side by '2'.
t = 42.5

Simplifying
t = 42.5