(1+9x)(-10)=80

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Solution for (1+9x)(-10)=80 equation: 



(1+9x)(-10)=80

We move all terms to the left:

(1+9x)(-10)-(80)=0

We add all the numbers together, and all the variables

(9x+1)(-10)-80=0

We multiply parentheses ..

(-90x-10)-80=0

We get rid of parentheses

-90x-10-80=0

We add all the numbers together, and all the variables

-90x-90=0

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

-90x=90

x=90/-90

x=-1

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