3(1+2+3+4+x)=90

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Solution for 3(1+2+3+4+x)=90 equation: 



3(1+2+3+4+x)=90

We move all terms to the left:

3(1+2+3+4+x)-(90)=0

We add all the numbers together, and all the variables

3(x+10)-90=0

We multiply parentheses

3x+30-90=0

We add all the numbers together, and all the variables

3x-60=0

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

3x=60

x=60/3

x=20

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