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3.50x+5.50+6x=51
We move all terms to the left:
3.50x+5.50+6x-(51)=0
We add all the numbers together, and all the variables
9.5x-45.5=0
We move all terms containing x to the left, all other terms to the right
9.5x=45.5
x=45.5/9.5
x=4+5/6.33333333333
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