3(7x+42)=42

Solution for 3(7x+42)=42 equation:

Simplifying
3(7x + 42) = 42

Reorder the terms:
3(42 + 7x) = 42
(42 * 3 + 7x * 3) = 42
(126 + 21x) = 42

Solving
126 + 21x = 42

Solving for variable 'x'.

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

Add '-126' to each side of the equation.
126 + -126 + 21x = 42 + -126

Combine like terms: 126 + -126 = 0
0 + 21x = 42 + -126
21x = 42 + -126

Combine like terms: 42 + -126 = -84
21x = -84

Divide each side by '21'.
x = -4

Simplifying
x = -4