7=(-13)+d

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Solution for 7=(-13)+d equation:


Simplifying
7 = (-13) + d
7 = -13 + d

Solving
7 = -13 + 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.
7 + -1d = -13 + d + -1d

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

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 = -20
-1d = -20

Divide each side by '-1'.
d = 20

Simplifying
d = 20

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