4d-8=-d+7

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Solution for 4d-8=-d+7 equation: 



4d-8=-d+7

We move all terms to the left:

4d-8-(-d+7)=0

We add all the numbers together, and all the variables

4d-(-1d+7)-8=0

We get rid of parentheses

4d+1d-7-8=0

We add all the numbers together, and all the variables

5d-15=0

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

5d=15

d=15/5

d=3

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