Answer:
The number is;
6
Explanation:
a + 7 = 13
a + 7 - 7 = 13 -7
a + 0 = 6
a = 6
Check:
6 + 7 = 13
Answer:6
Step-by-step explanation: x+7=13
so to find the number minus 13 and 7
13-7=x
13-7=6
x=6
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