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180=5x+x+7.2
We move all terms to the left:
180-(5x+x+7.2)=0
We add all the numbers together, and all the variables
-(6x+7.2)+180=0
We get rid of parentheses
-6x-7.2+180=0
We add all the numbers together, and all the variables
-6x+172.8=0
We move all terms containing x to the left, all other terms to the right
-6x=-172.8
x=-172.8/-6
x=28+1.7142857142857/2.1428571428571
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