7x^2=21x^2

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Solution for 7x^2=21x^2 equation: 


Simplifying
7x2 = 21x2

Solving
7x2 = 21x2

Solving for variable 'x'.

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

Add '-21x2' to each side of the equation.
7x2 + -21x2 = 21x2 + -21x2

Combine like terms: 7x2 + -21x2 = -14x2
-14x2 = 21x2 + -21x2

Combine like terms: 21x2 + -21x2 = 0
-14x2 = 0

Divide each side by '-14'.
x2 = 0

Simplifying
x2 = 0

Take the square root of each side:
x = {0}

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