Ответ:
Пошаговое объяснение:
63:(x:7)=9
x:7 = 63:9
x:7 = 7
x = 7*7
x = 49
100+(y*75)=473
75y = 473 - 100
75y = 373
y = 373 : 75
y = 4 73/75
540:(x*154)=90
154x = 540:90
154x = 6
x = 6 : 154
x = 3/77
700-(a+345)=80
a+345 = 700 - 80
a+345 = 620
a = 620 - 345
a = 275
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Ответ:
Пошаговое объяснение:
63:(x:7)=9
x:7 = 63:9
x:7 = 7
x = 7*7
x = 49
100+(y*75)=473
75y = 473 - 100
75y = 373
y = 373 : 75
y = 4 73/75
540:(x*154)=90
154x = 540:90
154x = 6
x = 6 : 154
x = 3/77
700-(a+345)=80
a+345 = 700 - 80
a+345 = 620
a = 620 - 345
a = 275