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56.5=10x+30
We move all terms to the left:
56.5-(10x+30)=0
We get rid of parentheses
-10x-30+56.5=0
We add all the numbers together, and all the variables
-10x+26.5=0
We move all terms containing x to the left, all other terms to the right
-10x=-26.5
x=-26.5/-10
x=2+2.6/4
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