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90+0.50x=30+0.80
We move all terms to the left:
90+0.50x-(30+0.80)=0
We add all the numbers together, and all the variables
0.50x+90-(30.8)=0
We add all the numbers together, and all the variables
0.50x+59.2=0
We move all terms containing x to the left, all other terms to the right
0.50x=-59.2
x=-59.2/0.50
x=-118+0.2/0.50
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