-1+-2d=7

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Solution for -1+-2d=7 equation: 


Simplifying
-1 + -2d = 7

Solving
-1 + -2d = 7

Solving for variable 'd'.

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

Add '1' to each side of the equation.
-1 + 1 + -2d = 7 + 1

Combine like terms: -1 + 1 = 0
0 + -2d = 7 + 1
-2d = 7 + 1

Combine like terms: 7 + 1 = 8
-2d = 8

Divide each side by '-2'.
d = -4

Simplifying
d = -4

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