126=3(7-7x)

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Solution for 126=3(7-7x) equation:


Simplifying
126 = 3(7 + -7x)
126 = (7 * 3 + -7x * 3)
126 = (21 + -21x)

Solving
126 = 21 + -21x

Solving for variable 'x'.

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

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

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

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

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

Combine like terms: 21 + -126 = -105
21x = -105

Divide each side by '21'.
x = -5

Simplifying
x = -5

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