-5(3x+7)=100

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Solution for -5(3x+7)=100 equation: 



-5(3x+7)=100

We move all terms to the left:

-5(3x+7)-(100)=0

We multiply parentheses

-15x-35-100=0

We add all the numbers together, and all the variables

-15x-135=0

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

-15x=135

x=135/-15

x=-9

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