3-5x=4x-42

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Solution for 3-5x=4x-42 equation: 



3-5x=4x-42

We move all terms to the left:

3-5x-(4x-42)=0

We get rid of parentheses

-5x-4x+42+3=0

We add all the numbers together, and all the variables

-9x+45=0

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

-9x=-45

x=-45/-9

x=+5

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