30+15x=120+10x

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Solution for 30+15x=120+10x equation: 



30+15x=120+10x

We move all terms to the left:

30+15x-(120+10x)=0

We add all the numbers together, and all the variables

15x-(10x+120)+30=0

We get rid of parentheses

15x-10x-120+30=0

We add all the numbers together, and all the variables

5x-90=0

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

5x=90

x=90/5

x=18

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