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3x+20+4(2x+1)=122
We move all terms to the left:
3x+20+4(2x+1)-(122)=0
We add all the numbers together, and all the variables
3x+4(2x+1)-102=0
We multiply parentheses
3x+8x+4-102=0
We add all the numbers together, and all the variables
11x-98=0
We move all terms containing x to the left, all other terms to the right
11x=98
x=98/11
x=8+10/11
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