2 x-20=32 - x=25, 8 x+7=(1/512) - x=-10, 216 2x-10=216 5 - x=7,5, 27 3x+12=81 2x+30 - x=84, (1/64) x+2=4 x-9 - x=0,75, 7 x+4= 343 - x=-1, (4/8) 2x-7= 64 - x=0,5,

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