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Simplifying
16x2 + x2 = 153
Combine like terms: 16x2 + x2 = 17x2
17x2 = 153
Solving
17x2 = 153
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Divide each side by '17'.
x2 = 9
Simplifying
x2 = 9
Take the square root of each side:
x = {-3, 3}
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