Ответ:
а) (x + 13) - 19 = 32
x + 13 - 19 - 32 = 0
х -38 = 0
х = 38
Проверка:
(38 + 13) - 19 = 32
51 - 19 = 32
32 = 32
верно
б)(y – 137) + 123 = 169
y – 137 + 123 - 169 = 0
у - 183 = 0
у = 183
(183 – 137) + 123 = 169
46 + 123 = 169
169 = 169
в) (12 + x) - 12 = 40
12 + x - 12 = 40
х = 40
(12 + 40) - 12 = 40
52 - 12 = 40
40 = 40
г) 841 + (y – 108) = 909
841 + y – 108 - 909 = 0
у - 176 = 0
у = 176
841 + (176 – 108) = 909
841 + 68 = 909
909 = 909
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Answers & Comments
Ответ:
а) (x + 13) - 19 = 32
x + 13 - 19 - 32 = 0
х -38 = 0
х = 38
Проверка:
(38 + 13) - 19 = 32
51 - 19 = 32
32 = 32
верно
б)(y – 137) + 123 = 169
y – 137 + 123 - 169 = 0
у - 183 = 0
у = 183
Проверка:
(183 – 137) + 123 = 169
46 + 123 = 169
169 = 169
верно
в) (12 + x) - 12 = 40
12 + x - 12 = 40
х = 40
Проверка:
(12 + 40) - 12 = 40
52 - 12 = 40
40 = 40
верно
г) 841 + (y – 108) = 909
841 + y – 108 - 909 = 0
у - 176 = 0
у = 176
Проверка:
841 + (176 – 108) = 909
841 + 68 = 909
909 = 909
верно