-42=-2t

Solution for -42=-2t equation:

Simplifying
-42 = -2t

Solving
-42 = -2t

Solving for variable 't'.

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

Add '2t' to each side of the equation.
-42 + 2t = -2t + 2t

Combine like terms: -2t + 2t = 0
-42 + 2t = 0

Add '42' to each side of the equation.
-42 + 42 + 2t = 0 + 42

Combine like terms: -42 + 42 = 0
0 + 2t = 0 + 42
2t = 0 + 42

Combine like terms: 0 + 42 = 42
2t = 42

Divide each side by '2'.
t = 21

Simplifying
t = 21