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x-0.8x=0.8x-0.8x+5
We move all terms to the left:
x-0.8x-(0.8x-0.8x+5)=0
We add all the numbers together, and all the variables
x-0.8x-5=0
We add all the numbers together, and all the variables
0.2x-5=0
We move all terms containing x to the left, all other terms to the right
0.2x=5
x=5/0.2
x=25
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