7[3(x-5)]=

Solution for 7[3(x-5)]= equation:

Simplifying
7[3(x + -5)] = 0

Reorder the terms:
7[3(-5 + x)] = 0
7[(-5 * 3 + x * 3)] = 0
7[(-15 + 3x)] = 0
[-15 * 7 + 3x * 7] = 0
[-105 + 21x] = 0

Solving
-105 + 21x = 0

Solving for variable 'x'.

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

Add '105' to each side of the equation.
-105 + 105 + 21x = 0 + 105

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

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

Divide each side by '21'.
x = 5

Simplifying
x = 5