18-(0.4+d)=8.7

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Solution for 18-(0.4+d)=8.7 equation: 



18-(0.4+d)=8.7

We move all terms to the left:

18-(0.4+d)-(8.7)=0

We add all the numbers together, and all the variables

-(d+0.4)+18-(8.7)=0

We add all the numbers together, and all the variables

-(d+0.4)+9.3=0

We get rid of parentheses

-d-0.4+9.3=0

We add all the numbers together, and all the variables

-1d+8.9=0

We move all terms containing d to the left, all other terms to the right

-d=-8.9

d=-8.9/-1

d=8+0.9/1

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