-21(-8)=d

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Solution for -21(-8)=d equation:


Simplifying
-21(-8) = d

Multiply -21 * -8
168 = d

Solving
168 = d

Solving for variable 'd'.

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

Add '-1d' to each side of the equation.
168 + -1d = d + -1d

Combine like terms: d + -1d = 0
168 + -1d = 0

Add '-168' to each side of the equation.
168 + -168 + -1d = 0 + -168

Combine like terms: 168 + -168 = 0
0 + -1d = 0 + -168
-1d = 0 + -168

Combine like terms: 0 + -168 = -168
-1d = -168

Divide each side by '-1'.
d = 168

Simplifying
d = 168

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