42=-3(2t-1)

Solution for 42=-3(2t-1) equation:

Simplifying
42 = -3(2t + -1)

Reorder the terms:
42 = -3(-1 + 2t)
42 = (-1 * -3 + 2t * -3)
42 = (3 + -6t)

Solving
42 = 3 + -6t

Solving for variable 't'.

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

Add '6t' to each side of the equation.
42 + 6t = 3 + -6t + 6t

Combine like terms: -6t + 6t = 0
42 + 6t = 3 + 0
42 + 6t = 3

Add '-42' to each side of the equation.
42 + -42 + 6t = 3 + -42

Combine like terms: 42 + -42 = 0
0 + 6t = 3 + -42
6t = 3 + -42

Combine like terms: 3 + -42 = -39
6t = -39

Divide each side by '6'.
t = -6.5

Simplifying
t = -6.5