4.9-10.5*t-77=0

Solution for 4.9-10.5*t-77=0 equation:

Simplifying
4.9 + -10.5t + -77 = 0

Reorder the terms:
4.9 + -77 + -10.5t = 0

Combine like terms: 4.9 + -77 = -72.1
-72.1 + -10.5t = 0

Solving
-72.1 + -10.5t = 0

Solving for variable 't'.

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

Add '72.1' to each side of the equation.
-72.1 + 72.1 + -10.5t = 0 + 72.1

Combine like terms: -72.1 + 72.1 = 0.0
0.0 + -10.5t = 0 + 72.1
-10.5t = 0 + 72.1

Combine like terms: 0 + 72.1 = 72.1
-10.5t = 72.1

Divide each side by '-10.5'.
t = -6.866666667

Simplifying
t = -6.866666667