4x+21+40=7x-2

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Solution for 4x+21+40=7x-2 equation: 



4x+21+40=7x-2

We move all terms to the left:

4x+21+40-(7x-2)=0

We add all the numbers together, and all the variables

4x-(7x-2)+61=0

We get rid of parentheses

4x-7x+2+61=0

We add all the numbers together, and all the variables

-3x+63=0

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

-3x=-63

x=-63/-3

x=+21

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