5+7x-4=3x-x+21

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Solution for 5+7x-4=3x-x+21 equation:



5+7x-4=3x-x+21
We move all terms to the left:
5+7x-4-(3x-x+21)=0
We add all the numbers together, and all the variables
7x-(2x+21)+5-4=0
We add all the numbers together, and all the variables
7x-(2x+21)+1=0
We get rid of parentheses
7x-2x-21+1=0
We add all the numbers together, and all the variables
5x-20=0
We move all terms containing x to the left, all other terms to the right
5x=20
x=20/5
x=4

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