(-21*-21)-(-21*-1+1)=x

Solution for (-21*-21)-(-21*-1+1)=x equation:

Simplifying
(-21 * -21) + -1(-21 * -1 + 1) = x

Multiply -21 * -21
(441) + -1(-21 * -1 + 1) = x
441 + -1(-21 * -1 + 1) = x

Multiply -21 * -1
441 + -1(21 + 1) = x

Combine like terms: 21 + 1 = 22
441 + -1(22) = x

Multiply -1 * 22
441 + -22 = x

Combine like terms: 441 + -22 = 419
419 = x

Solving
419 = 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.
419 + -1x = x + -1x

Combine like terms: x + -1x = 0
419 + -1x = 0

Add '-419' to each side of the equation.
419 + -419 + -1x = 0 + -419

Combine like terms: 419 + -419 = 0
0 + -1x = 0 + -419
-1x = 0 + -419

Combine like terms: 0 + -419 = -419
-1x = -419

Divide each side by '-1'.
x = 419

Simplifying
x = 419