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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 = 25
7x2 = 25
Divide each side by '7'.
x2 = 3.571428571
Simplifying
x2 = 3.571428571
Take the square root of each side:
x = {-1.889822365, 1.889822365}
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