Пмогите решить номер 2.5 пример 1-3 даю 25 баллов срочно

(9x+7)/2 - (x - (x-2)/7)=3663x+49-14x+2x-4=50451x=459x=9(x-3)/5 - 2((x-5)/7+(x-7)/9)=(x+1)/35(x-3)/5 - 2((9x-45+7x-49)/63)=(x+1)/35(x-3)/5 - (32x-188)/63=(x+1)/3563x-189-160x+940-9x-9=0106x=-742x=-61/4(2x+3/7) - 2x/5 = x/4 - 3(x+1)/352/4x+3/28-2/5x-1/4x+3/35x+3/35=01/4x-2/5x+3/35x=-3/35-3/28(35x-56x+12x)/35*4=-27/35*49x=27x=3