13-5d=-21

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Solution for 13-5d=-21 equation: 


Simplifying
13 + -5d = -21

Solving
13 + -5d = -21

Solving for variable 'd'.

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

Add '-13' to each side of the equation.
13 + -13 + -5d = -21 + -13

Combine like terms: 13 + -13 = 0
0 + -5d = -21 + -13
-5d = -21 + -13

Combine like terms: -21 + -13 = -34
-5d = -34

Divide each side by '-5'.
d = 6.8

Simplifying
d = 6.8

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