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4x+8x=3+6
We move all terms to the left:
4x+8x-(3+6)=0
We add all the numbers together, and all the variables
4x+8x-9=0
We add all the numbers together, and all the variables
12x-9=0
We move all terms containing x to the left, all other terms to the right
12x=9
x=9/12
x=3/4
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