х - 56 * 2 = 850
х - 112 = 850
х = 850 + 112
х = 962
962 - 56 * 2 = 850
962 - 112 = 850
850 = 850
748 + 205 + х = 2 000
953 + х = 2 000
х = 2 000 - 953
х = 1 047
748 + 205 + 1 047 = 2 000
953 + 1 047 = 2 000
2 000 = 2 000
х + 89 * 3 = 748
х + 267 = 748
х = 748 - 267
х = 481
481 + 89 * 3 = 748
481 + 267 = 748
748 = 748
2 * х + 1 457 = 10 267
2 * х = 10 267 - 1 457
2 * х = 8 810
х = 8 810 : 2
х = 4 405
2 * 4 405 + 1 457 = 10 267
8 810 + 1 457 = 10 267
10 267 = 10 267
Пошаговое объяснение:
1) 5049/200-4х15,6+20,2=5049/200-4х*78/5+20,2=5049/200-4х*78/5+101/5
2)1/200*(5049-4*200х*78/5+4040)=1/200*(5049-4*40х*78+4040)=1/200*(5049-12480х+4040)=1/200*(9089-12480) =1/200*(9089-12480х)=0,005(9089-12480х)
Вроде так..