90+20d=70

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Solution for 90+20d=70 equation: 


Simplifying
90 + 20d = 70

Solving
90 + 20d = 70

Solving for variable 'd'.

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

Add '-90' to each side of the equation.
90 + -90 + 20d = 70 + -90

Combine like terms: 90 + -90 = 0
0 + 20d = 70 + -90
20d = 70 + -90

Combine like terms: 70 + -90 = -20
20d = -20

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

Simplifying
d = -1

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