3(1-7x)-4=125

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Solution for 3(1-7x)-4=125 equation: 



3(1-7x)-4=125

We move all terms to the left:

3(1-7x)-4-(125)=0

We add all the numbers together, and all the variables

3(-7x+1)-4-125=0

We add all the numbers together, and all the variables

3(-7x+1)-129=0

We multiply parentheses

-21x+3-129=0

We add all the numbers together, and all the variables

-21x-126=0

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

-21x=126

x=126/-21

x=-6

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