70+40d=40+20d

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Solution for 70+40d=40+20d equation: 



70+40d=40+20d

We move all terms to the left:

70+40d-(40+20d)=0

We add all the numbers together, and all the variables

40d-(20d+40)+70=0

We get rid of parentheses

40d-20d-40+70=0

We add all the numbers together, and all the variables

20d+30=0

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

20d=-30

d=-30/20

d=-1+1/2

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