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20+2x=6+9
We move all terms to the left:
20+2x-(6+9)=0
We add all the numbers together, and all the variables
2x+20-15=0
We add all the numbers together, and all the variables
2x+5=0
We move all terms containing x to the left, all other terms to the right
2x=-5
x=-5/2
x=-2+1/2
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