3(7x+21)=105

Solution for 3(7x+21)=105 equation:

Simplifying
3(7x + 21) = 105

Reorder the terms:
3(21 + 7x) = 105
(21 * 3 + 7x * 3) = 105
(63 + 21x) = 105

Solving
63 + 21x = 105

Solving for variable 'x'.

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

Add '-63' to each side of the equation.
63 + -63 + 21x = 105 + -63

Combine like terms: 63 + -63 = 0
0 + 21x = 105 + -63
21x = 105 + -63

Combine like terms: 105 + -63 = 42
21x = 42

Divide each side by '21'.
x = 2

Simplifying
x = 2