15(20+d)=20

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Solution for 15(20+d)=20 equation: 



15(20+d)=20

We move all terms to the left:

15(20+d)-(20)=0

We add all the numbers together, and all the variables

15(d+20)-20=0

We multiply parentheses

15d+300-20=0

We add all the numbers together, and all the variables

15d+280=0

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

15d=-280

d=-280/15

d=-18+2/3

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