3(7-x)+5(5-4)=9

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Solution for 3(7-x)+5(5-4)=9 equation: 



3(7-x)+5(5-4)=9

We move all terms to the left:

3(7-x)+5(5-4)-(9)=0

determiningTheFunctionDomain
3(7-x)-9+5(5-4)=0

We add all the numbers together, and all the variables

3(-1x+7)-9+51=0

We add all the numbers together, and all the variables

3(-1x+7)+42=0

We multiply parentheses

-3x+21+42=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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