20+d=7

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Solution for 20+d=7 equation: 


Simplifying
20 + d = 7

Solving
20 + d = 7

Solving for variable 'd'.

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

Add '-20' to each side of the equation.
20 + -20 + d = 7 + -20

Combine like terms: 20 + -20 = 0
0 + d = 7 + -20
d = 7 + -20

Combine like terms: 7 + -20 = -13
d = -13

Simplifying
d = -13

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