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Simplifying
405 = 5I2
Solving
405 = 5I2
Solving for variable 'I'.
Move all terms containing I to the left, all other terms to the right.
Add '-5I2' to each side of the equation.
405 + -5I2 = 5I2 + -5I2
Combine like terms: 5I2 + -5I2 = 0
405 + -5I2 = 0
Add '-405' to each side of the equation.
405 + -405 + -5I2 = 0 + -405
Combine like terms: 405 + -405 = 0
0 + -5I2 = 0 + -405
-5I2 = 0 + -405
Combine like terms: 0 + -405 = -405
-5I2 = -405
Divide each side by '-5'.
I2 = 81
Simplifying
I2 = 81
Take the square root of each side:
I = {-9, 9}
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