7x^2-21x^2=

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


Simplifying
7x2 + -21x2 = 0

Combine like terms: 7x2 + -21x2 = -14x2
-14x2 = 0

Solving
-14x2 = 0

Solving for variable 'x'.

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

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

Simplifying
x2 = 0

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

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