Решите уравнения,
1) x + 9 = 14
2) 55 + x = 75
3) x - 45 = 30
4) х - 12 = 42
5) 34 - x = 24
6) x - 23 = 56
1) x + 9 = 14
2) 55 + x = 75
3) x - 45 = 30
4) х - 12 = 42
5) 34 - x = 24
6) x - 23 = 56
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Ответ:
x + 9 = 14
х=14-9
х=5
2) 55 + x = 75
х=75-55
х=20
3) x - 45 = 30
х=30+45
х=75
4) х - 12 = 42
х=42+12
х=54
5) 34 - x = 24
х=34-24
х=10
6) x - 23 = 56
х=56+23
х=79
1) ×+9=14
×=14-9
×=5.
______
Проверка
5+9=14
2)55+×=75
×=75-55
×=20
_____
Проверка
55+20=75
3)×-45=30
×=30+45
×=75
_______
Проверка
75-45=30
4)×-12=42
×=42+12
×=54
________
Проверка
54-12=42
5)34-×=24
×=34-24
×=10
________
Проверка
34-10=24
6)×-23=56
×=56+23
×=79
______
79-23=56