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6.5+0.7x=0.9
We move all terms to the left:
6.5+0.7x-(0.9)=0
We add all the numbers together, and all the variables
0.7x+5.6=0
We move all terms containing x to the left, all other terms to the right
0.7x=-5.6
x=-5.6/0.7
x=-8
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