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0.9x+20=330
We move all terms to the left:
0.9x+20-(330)=0
We add all the numbers together, and all the variables
0.9x-310=0
We move all terms containing x to the left, all other terms to the right
0.9x=310
x=310/0.9
x=344+0.39999999999998/0.9
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