7(x-4)=21x

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Solution for 7(x-4)=21x equation:


Simplifying
7(x + -4) = 21x

Reorder the terms:
7(-4 + x) = 21x
(-4 * 7 + x * 7) = 21x
(-28 + 7x) = 21x

Solving
-28 + 7x = 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.
-28 + 7x + -21x = 21x + -21x

Combine like terms: 7x + -21x = -14x
-28 + -14x = 21x + -21x

Combine like terms: 21x + -21x = 0
-28 + -14x = 0

Add '28' to each side of the equation.
-28 + 28 + -14x = 0 + 28

Combine like terms: -28 + 28 = 0
0 + -14x = 0 + 28
-14x = 0 + 28

Combine like terms: 0 + 28 = 28
-14x = 28

Divide each side by '-14'.
x = -2

Simplifying
x = -2

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