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0.45x+0.5x=x-2.5
We move all terms to the left:
0.45x+0.5x-(x-2.5)=0
We add all the numbers together, and all the variables
0.95x-(x-2.5)=0
We get rid of parentheses
0.95x-x+2.5=0
We add all the numbers together, and all the variables
-0.05x+2.5=0
We move all terms containing x to the left, all other terms to the right
-0.05x=-2.5
x=-2.5/-0.05
x=+50
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