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Simplifying
10x2 + 5 = 815
Reorder the terms:
5 + 10x2 = 815
Solving
5 + 10x2 = 815
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-5' to each side of the equation.
5 + -5 + 10x2 = 815 + -5
Combine like terms: 5 + -5 = 0
0 + 10x2 = 815 + -5
10x2 = 815 + -5
Combine like terms: 815 + -5 = 810
10x2 = 810
Divide each side by '10'.
x2 = 81
Simplifying
x2 = 81
Take the square root of each side:
x = {-9, 9}
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