42x+21=72x-63

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Solution for 42x+21=72x-63 equation: 



42x+21=72x-63

We move all terms to the left:

42x+21-(72x-63)=0

We get rid of parentheses

42x-72x+63+21=0

We add all the numbers together, and all the variables

-30x+84=0

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

-30x=-84

x=-84/-30

x=2+4/5

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