7(10+5x)=420

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Solution for 7(10+5x)=420 equation: 



7(10+5x)=420

We move all terms to the left:

7(10+5x)-(420)=0

We add all the numbers together, and all the variables

7(5x+10)-420=0

We multiply parentheses

35x+70-420=0

We add all the numbers together, and all the variables

35x-350=0

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

35x=350

x=350/35

x=10

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