21t-3(t-1)=0

Solution for 21t-3(t-1)=0 equation:

Simplifying
21t + -3(t + -1) = 0

Reorder the terms:
21t + -3(-1 + t) = 0
21t + (-1 * -3 + t * -3) = 0
21t + (3 + -3t) = 0

Reorder the terms:
3 + 21t + -3t = 0

Combine like terms: 21t + -3t = 18t
3 + 18t = 0

Solving
3 + 18t = 0

Solving for variable 't'.

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

Add '-3' to each side of the equation.
3 + -3 + 18t = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 18t = 0 + -3
18t = 0 + -3

Combine like terms: 0 + -3 = -3
18t = -3

Divide each side by '18'.
t = -0.1666666667

Simplifying
t = -0.1666666667