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Simplifying
81x2 + 10 = 91
Reorder the terms:
10 + 81x2 = 91
Solving
10 + 81x2 = 91
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-10' to each side of the equation.
10 + -10 + 81x2 = 91 + -10
Combine like terms: 10 + -10 = 0
0 + 81x2 = 91 + -10
81x2 = 91 + -10
Combine like terms: 91 + -10 = 81
81x2 = 81
Divide each side by '81'.
x2 = 1
Simplifying
x2 = 1
Take the square root of each side:
x = {-1, 1}
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