5x+(x+30)+(x-20)+(x-10)=720

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Solution for 5x+(x+30)+(x-20)+(x-10)=720 equation: 



5x+(x+30)+(x-20)+(x-10)=720

We move all terms to the left:

5x+(x+30)+(x-20)+(x-10)-(720)=0

We get rid of parentheses

5x+x+x+x+30-20-10-720=0

We add all the numbers together, and all the variables

8x-720=0

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

8x=720

x=720/8

x=90

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