40x+100=42x-100

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Solution for 40x+100=42x-100 equation: 



40x+100=42x-100

We move all terms to the left:

40x+100-(42x-100)=0

We get rid of parentheses

40x-42x+100+100=0

We add all the numbers together, and all the variables

-2x+200=0

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

-2x=-200

x=-200/-2

x=+100

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