3x=x+30+40

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Solution for 3x=x+30+40 equation: 



3x=x+30+40

We move all terms to the left:

3x-(x+30+40)=0

We add all the numbers together, and all the variables

3x-(x+70)=0

We get rid of parentheses

3x-x-70=0

We add all the numbers together, and all the variables

2x-70=0

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

2x=70

x=70/2

x=35

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