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Simplifying
(21x2 + 14x) = 7x + 7x
Reorder the terms:
(14x + 21x2) = 7x + 7x
Remove parenthesis around (14x + 21x2)
14x + 21x2 = 7x + 7x
Combine like terms: 7x + 7x = 14x
14x + 21x2 = 14x
Add '-14x' to each side of the equation.
14x + -14x + 21x2 = 14x + -14x
Combine like terms: 14x + -14x = 0
0 + 21x2 = 14x + -14x
21x2 = 14x + -14x
Combine like terms: 14x + -14x = 0
21x2 = 0
Solving
21x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Divide each side by '21'.
x2 = 0
Simplifying
x2 = 0
Take the square root of each side:
x = {0}
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