20x-40=90x-4

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Solution for 20x-40=90x-4 equation: 



20x-40=90x-4

We move all terms to the left:

20x-40-(90x-4)=0

We get rid of parentheses

20x-90x+4-40=0

We add all the numbers together, and all the variables

-70x-36=0

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

-70x=36

x=36/-70

x=-18/35

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