7=13+d

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Solution for 7=13+d equation:


Simplifying
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 = 6
-1d = 6

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

Simplifying
d = -6

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