(7 1-х) 3 9=4 5 July 8, 2019 16 32 64 128 7 1 х )+ 3 9 4 5 7 1 3 9 4 5 (7 1-х)+3 9=4 5 7/9÷3 1=х÷9 3 7 3-(4 9-х)=-2 9 9 – 7(х + 3) = 5 – 4х
