3x+7(-7x-20)=90

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Solution for 3x+7(-7x-20)=90 equation: 



3x+7(-7x-20)=90

We move all terms to the left:

3x+7(-7x-20)-(90)=0

We multiply parentheses

3x-49x-140-90=0

We add all the numbers together, and all the variables

-46x-230=0

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

-46x=230

x=230/-46

x=-5

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