Odpowiedź:
1. 2a + 1 = 8
2a = 7
a = = 3
2. 5a = 3
5a =
a = =
3. a : 6 = 1
a = × 6 = = 10
4. 1 + a = 1
+ a =
a = - = - =
5. a - 2 = 1
a = 1 + 2 = + = + = = 3
6. 12 : a =
12 = a
3a = 48
a = = 16
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Odpowiedź:
1. 2a + 1 = 8
2a = 7
a = = 3
2. 5a = 3
5a =
a = =
3. a : 6 = 1
a = × 6 = = 10
4. 1 + a = 1
+ a =
a = - = - =
5. a - 2 = 1
a = 1 + 2 = + = + = = 3
6. 12 : a =
12 = a
3a = 48
a = = 16