42-9=3(t+7)

Solution for 42-9=3(t+7) equation:

Simplifying
42 + -9 = 3(t + 7)

Combine like terms: 42 + -9 = 33
33 = 3(t + 7)

Reorder the terms:
33 = 3(7 + t)
33 = (7 * 3 + t * 3)
33 = (21 + 3t)

Solving
33 = 21 + 3t

Solving for variable 't'.

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

Add '-3t' to each side of the equation.
33 + -3t = 21 + 3t + -3t

Combine like terms: 3t + -3t = 0
33 + -3t = 21 + 0
33 + -3t = 21

Add '-33' to each side of the equation.
33 + -33 + -3t = 21 + -33

Combine like terms: 33 + -33 = 0
0 + -3t = 21 + -33
-3t = 21 + -33

Combine like terms: 21 + -33 = -12
-3t = -12

Divide each side by '-3'.
t = 4

Simplifying
t = 4