7-d=13

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Solution for 7-d=13 equation: 


Simplifying
7 + -1d = 13

Solving
7 + -1d = 13

Solving for variable 'd'.

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

Add '-7' to each side of the equation.
7 + -7 + -1d = 13 + -7

Combine like terms: 7 + -7 = 0
0 + -1d = 13 + -7
-1d = 13 + -7

Combine like terms: 13 + -7 = 6
-1d = 6

Divide each side by '-1'.
d = -6

Simplifying
d = -6

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