5(4+x)=420

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Solution for 5(4+x)=420 equation: 



5(4+x)=420

We move all terms to the left:

5(4+x)-(420)=0

We add all the numbers together, and all the variables

5(x+4)-420=0

We multiply parentheses

5x+20-420=0

We add all the numbers together, and all the variables

5x-400=0

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

5x=400

x=400/5

x=80

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