3(4x+x)=-75

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Solution for 3(4x+x)=-75 equation: 



3(4x+x)=-75

We move all terms to the left:

3(4x+x)-(-75)=0

We add all the numbers together, and all the variables

3(+5x)-(-75)=0

We add all the numbers together, and all the variables

3(+5x)+75=0

We multiply parentheses

15x+75=0

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

15x=-75

x=-75/15

x=-5

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