Solve -998*t + 101*t - 999*t = -59*t - 67969 for t.
Solve this plz.

A: 37

Solve 0 = 318*a + 597 + 3537 for a.
Solve this plz.

A: -13

Solve 3315*u + 1800*u - 248583 = 7042*u for u.
Solve this plz.

A:
-129