Решите пожалуйста уравнение 9х-7/4 - 9х+13/8=3х-х/2,,,,6х+7/6+5х-8/9=3
1) (9x -7)/4 -(9x+13)/8=3x-(x/2) (2(9x-7) -9x+13)/8 =(6x -x)/2 (18x -14 -9x +13)/8 =5x/2 (9x -1)/8 -5x/2 =0 (9x -1 -5x*4)/8 =0 9x -1 -20x =0 -11x =1 x = -1/11 2) (6x+7)/6 +(5x -8)/9 =3 (3(6x +7) +2(5x -8))/18 =3 18x +21 +10x -16 =3*18 28x +5 =54 28x =54 -5 28x =49 x =49/28 x =1.75
спасибо
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