x - 0.1x + 0.8 = 0.2x + 0.1

Please show me how to solve.
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1 Answer

x -0.1x +0.8 = 0.2x +0.1

multipli both sides bi 10:

10x -x +8=2x +1

9x+8=2x+1

9x-2x=1-8

7x=-7

x=-1
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