Verified answer

83.1) (x-23) 14 = 56; розкриваємо дужки 14x-(14*23)=56 x=56+(14*23)/14 2) (200+ x): 12 =32; 3) 205 (y-27) = 41; 205y-(205*27)=41 y=41+(205*27)/205 4) 729 (c-15) = 81; 729c-(729*15)=81 c=81+(729*15)/729 b=7120-(89*13)/89 6) 12 (97-z) = 240. 729c-81+(729*15) 5) 89 (b + 13) = 7120; 89b+(89*13)=7120 12*97-12z=240 12*97-240-12z ((12*97)-240)/12=z