3x+x+(75+x)=180

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Solution for 3x+x+(75+x)=180 equation: 



3x+x+(75+x)=180

We move all terms to the left:

3x+x+(75+x)-(180)=0

We add all the numbers together, and all the variables

3x+x+(x+75)-180=0

We add all the numbers together, and all the variables

4x+(x+75)-180=0

We get rid of parentheses

4x+x+75-180=0

We add all the numbers together, and all the variables

5x-105=0

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

5x=105

x=105/5

x=21

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