4,5(7/15х+2/9)-0,77(8/11х-3/7)=-1,75 - вопрос №4571529077811371757141604 от котейка52 30.12.2020 23:36

Question

Математика: 4,5(7/15х+2/9)-0,77(8/11х-3/7)=-1,75

котейка52 · Answer

4,5(7/15х+2/9)-0,77(8/11х-3/7) = -1,754,5*7/15х + 4,5*2/9 - 0,77*8/11х - 0,77*3/7 = -1,754,5*7/15х + 1 - 0,77*8/11х -  0,33 = -1,754,5*7/15х - 0,77*8/11х = -1,75 +  0,33 - 14,5*7/15х - 0,77*8/11х = -2,4231,5/15х - 6,16/11х = - 2,42(31,5-6,16)/(15х-11х) = - 2,4225,34/4x = - 2,424x = 25,34/ - 2,424х ≈ -10х = -10/4 = 2.6 ≈ 3...