7x^2+9=16

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Solution for 7x^2+9=16 equation: 


Simplifying
7x2 + 9 = 16

Reorder the terms:
9 + 7x2 = 16

Solving
9 + 7x2 = 16

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + 7x2 = 16 + -9

Combine like terms: 9 + -9 = 0
0 + 7x2 = 16 + -9
7x2 = 16 + -9

Combine like terms: 16 + -9 = 7
7x2 = 7

Divide each side by '7'.
x2 = 1

Simplifying
x2 = 1

Take the square root of each side:
x = {-1, 1}

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