126=7x+3(7x-14)

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Solution for 126=7x+3(7x-14) equation:


Simplifying
126 = 7x + 3(7x + -14)

Reorder the terms:
126 = 7x + 3(-14 + 7x)
126 = 7x + (-14 * 3 + 7x * 3)
126 = 7x + (-42 + 21x)

Reorder the terms:
126 = -42 + 7x + 21x

Combine like terms: 7x + 21x = 28x
126 = -42 + 28x

Solving
126 = -42 + 28x

Solving for variable 'x'.

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

Add '-28x' to each side of the equation.
126 + -28x = -42 + 28x + -28x

Combine like terms: 28x + -28x = 0
126 + -28x = -42 + 0
126 + -28x = -42

Add '-126' to each side of the equation.
126 + -126 + -28x = -42 + -126

Combine like terms: 126 + -126 = 0
0 + -28x = -42 + -126
-28x = -42 + -126

Combine like terms: -42 + -126 = -168
-28x = -168

Divide each side by '-28'.
x = 6

Simplifying
x = 6

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