(-4)(-4)-21=x

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Solution for (-4)(-4)-21=x equation:


Simplifying
(-4)(-4) + -21 = x

Multiply -4 * -4
16 + -21 = x

Combine like terms: 16 + -21 = -5
-5 = x

Solving
-5 = x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-1x' to each side of the equation.
-5 + -1x = x + -1x

Combine like terms: x + -1x = 0
-5 + -1x = 0

Add '5' to each side of the equation.
-5 + 5 + -1x = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -1x = 0 + 5
-1x = 0 + 5

Combine like terms: 0 + 5 = 5
-1x = 5

Divide each side by '-1'.
x = -5

Simplifying
x = -5

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