246=3*40+7x

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Solution for 246=3*40+7x equation: 



246=3*40+7x

We move all terms to the left:

246-(3*40+7x)=0

We add all the numbers together, and all the variables

-(7x+120)+246=0

We get rid of parentheses

-7x-120+246=0

We add all the numbers together, and all the variables

-7x+126=0

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

-7x=-126

x=-126/-7

x=+18

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