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Simplifying
70 + -2x2 = 0
Solving
70 + -2x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-70' to each side of the equation.
70 + -70 + -2x2 = 0 + -70
Combine like terms: 70 + -70 = 0
0 + -2x2 = 0 + -70
-2x2 = 0 + -70
Combine like terms: 0 + -70 = -70
-2x2 = -70
Divide each side by '-2'.
x2 = 35
Simplifying
x2 = 35
Take the square root of each side:
x = {-5.916079783, 5.916079783}
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