42=23t+4(t+5)

Solution for 42=23t+4(t+5) equation:

Simplifying
42 = 23t + 4(t + 5)

Reorder the terms:
42 = 23t + 4(5 + t)
42 = 23t + (5 * 4 + t * 4)
42 = 23t + (20 + 4t)

Reorder the terms:
42 = 20 + 23t + 4t

Combine like terms: 23t + 4t = 27t
42 = 20 + 27t

Solving
42 = 20 + 27t

Solving for variable 't'.

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

Add '-27t' to each side of the equation.
42 + -27t = 20 + 27t + -27t

Combine like terms: 27t + -27t = 0
42 + -27t = 20 + 0
42 + -27t = 20

Add '-42' to each side of the equation.
42 + -42 + -27t = 20 + -42

Combine like terms: 42 + -42 = 0
0 + -27t = 20 + -42
-27t = 20 + -42

Combine like terms: 20 + -42 = -22
-27t = -22

Divide each side by '-27'.
t = 0.8148148148

Simplifying
t = 0.8148148148