7(3+4x)=357

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Solution for 7(3+4x)=357 equation: 


Simplifying
7(3 + 4x) = 357
(3 * 7 + 4x * 7) = 357
(21 + 28x) = 357

Solving
21 + 28x = 357

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 28x = 357 + -21

Combine like terms: 21 + -21 = 0
0 + 28x = 357 + -21
28x = 357 + -21

Combine like terms: 357 + -21 = 336
28x = 336

Divide each side by '28'.
x = 12

Simplifying
x = 12

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