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0.9*50+x*50=80
We move all terms to the left:
0.9*50+x*50-(80)=0
determiningTheFunctionDomain x*50-80+0.9*50=0
We add all the numbers together, and all the variables
x*50-35=0
Wy multiply elements
50x-35=0
We move all terms containing x to the left, all other terms to the right
50x=35
x=35/50
x=7/10
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