3x+5=17, 2x-7=9, 5x+8=3x+20, 4x-6=2x+10, 7x+3=2x+18, 9-3x=6x+18, 5x-12=3x+6, 4{x-2}=3x+6, 3{x+5}=2x+12, 6x+=2{x+10}.

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