x-1/4x+8=80%x

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x-1/4x+8=80%xx-1/4x+8=80%xx-1/4x+8=80%xx-1/4x+8=80%x3/4x-4/5x=-815x-16x=-160-x=-160x=160x=160x=160x=

x-1/4x+8=80%x
x-1/4x+8=80%x

x-1/4x+8=80%x
x-1/4x+8=80%x
3/4x-4/5x=-8
15x-16x=-160
-x=-160
x=160

x=160

x=160

x=160