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Simplifying
7(x2 + 7) = 100
Reorder the terms:
7(7 + x2) = 100
(7 * 7 + x2 * 7) = 100
(49 + 7x2) = 100
Solving
49 + 7x2 = 100
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-49' to each side of the equation.
49 + -49 + 7x2 = 100 + -49
Combine like terms: 49 + -49 = 0
0 + 7x2 = 100 + -49
7x2 = 100 + -49
Combine like terms: 100 + -49 = 51
7x2 = 51
Divide each side by '7'.
x2 = 7.285714286
Simplifying
x2 = 7.285714286
Take the square root of each side:
x = {-2.699206233, 2.699206233}
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