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

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



3(4-x)+4x=4x-9
We move all terms to the left:
3(4-x)+4x-(4x-9)=0
We add all the numbers together, and all the variables
3(-1x+4)+4x-(4x-9)=0
We add all the numbers together, and all the variables
4x+3(-1x+4)-(4x-9)=0
We multiply parentheses
4x-3x-(4x-9)+12=0
We get rid of parentheses
4x-3x-4x+9+12=0
We add all the numbers together, and all the variables
-3x+21=0
We move all terms containing x to the left, all other terms to the right
-3x=-21
x=-21/-3
x=+7

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