[81-4(-1)(20)]=

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Solution for [81-4(-1)(20)]= equation:


Simplifying
[81 + -4(-1)(20)] = 0

Multiply -4 * -1
[81 + 4 * 20] = 0

Multiply 4 * 20
[81 + 80] = 0

Combine like terms: 81 + 80 = 161
[161] = 0
161 = 0

Solving
161 = 0

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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