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7x-5(2x+1)=5x+15 7x-10x-5=5x+15 -8x=20 x=-2,5 x-1/6 - 2 =x-3/4 (x-1- 12) / 6 =(x-3)/4 4(x-13) = 6(x-3) 4x-52=6x-18 2x=-34 x=-17