11 7х 4 2 1 7х 8 9 July 8, 2019 16 32 64 128 11 7х-4 2=1 7х+8 9 –(11х - 7) + (7х + 9) = 8 11) 8х + 7х – х = 42 2 7-4х 11 4х+7 11
