7x-42-7=8x-40

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Solution for 7x-42-7=8x-40 equation: 



7x-42-7=8x-40

We move all terms to the left:

7x-42-7-(8x-40)=0

We add all the numbers together, and all the variables

7x-(8x-40)-49=0

We get rid of parentheses

7x-8x+40-49=0

We add all the numbers together, and all the variables

-1x-9=0

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

-x=9

x=9/-1

x=-9

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