42x=900+39x

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Solution for 42x=900+39x equation: 



42x=900+39x

We move all terms to the left:

42x-(900+39x)=0

We add all the numbers together, and all the variables

42x-(39x+900)=0

We get rid of parentheses

42x-39x-900=0

We add all the numbers together, and all the variables

3x-900=0

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

3x=900

x=900/3

x=300

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