129=3+7(3x-3)

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Solution for 129=3+7(3x-3) equation:


Simplifying
129 = 3 + 7(3x + -3)

Reorder the terms:
129 = 3 + 7(-3 + 3x)
129 = 3 + (-3 * 7 + 3x * 7)
129 = 3 + (-21 + 21x)

Combine like terms: 3 + -21 = -18
129 = -18 + 21x

Solving
129 = -18 + 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.
129 + -21x = -18 + 21x + -21x

Combine like terms: 21x + -21x = 0
129 + -21x = -18 + 0
129 + -21x = -18

Add '-129' to each side of the equation.
129 + -129 + -21x = -18 + -129

Combine like terms: 129 + -129 = 0
0 + -21x = -18 + -129
-21x = -18 + -129

Combine like terms: -18 + -129 = -147
-21x = -147

Divide each side by '-21'.
x = 7

Simplifying
x = 7

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