1) m + 8 = 2
m = 2 - 8
m= -6
проверка:
-6 + 8 = 2
2 = 2
2) m - 9 = 5
m = 5 + 9
m = 14
14 - 9 = 5
5 = 5
3) In - 7 = 2
ln = 2 + 7
ln = 9
9 - 7 = 2
4) 15 + n = 3
n = 3 - 15
n = -12
15 + (-12) = 3
3 = 3
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Answers & Comments
1) m + 8 = 2
m = 2 - 8
m= -6
проверка:
-6 + 8 = 2
2 = 2
2) m - 9 = 5
m = 5 + 9
m = 14
проверка:
14 - 9 = 5
5 = 5
3) In - 7 = 2
ln = 2 + 7
ln = 9
проверка:
9 - 7 = 2
2 = 2
4) 15 + n = 3
n = 3 - 15
n = -12
проверка:
15 + (-12) = 3
3 = 3