РЕШИТЕ УРАВНЕНИЯ (39-14+х)-(87-50)+40=69 (47-х)+(39-18+1)-48=2 (21+41+х)+(44-10-15)-17=50

Question

РЕШИТЕ УРАВНЕНИЯ (39-14+х)-(87-50)+40=69 (47-х)+(39-18+1)-48=2 (21+41+х)+(44-10-15)-17=50

Answer 1

39 - 14 + х - 87 + 50 + 40 = 69
х = 69 - 39 + 14 + 87 - 50 - 40
х = 170 - 129
х = 41
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47 - х + 39 - 18 + 1 - 48 = 2
21- х = 2
х = 21 - 2
х = 19
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21+ 41 + х + 44 - 10 - 15 -17 = 50
64 + х = 50
х = 50 - 64
х = - 14