13+d=7

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Solution for 13+d=7 equation: 


Simplifying
13 + d = 7

Solving
13 + d = 7

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 + d = 7 + -13

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

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

Simplifying
d = -6

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