78-x=-42+9x

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Solution for 78-x=-42+9x equation: 



78-x=-42+9x

We move all terms to the left:

78-x-(-42+9x)=0

We add all the numbers together, and all the variables

-x-(9x-42)+78=0

We add all the numbers together, and all the variables

-1x-(9x-42)+78=0

We get rid of parentheses

-1x-9x+42+78=0

We add all the numbers together, and all the variables

-10x+120=0

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

-10x=-120

x=-120/-10

x=+12

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