25(20+d)=420

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Solution for 25(20+d)=420 equation: 



25(20+d)=420

We move all terms to the left:

25(20+d)-(420)=0

We add all the numbers together, and all the variables

25(d+20)-420=0

We multiply parentheses

25d+500-420=0

We add all the numbers together, and all the variables

25d+80=0

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

25d=-80

d=-80/25

d=-3+1/5

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