Answer:
19x - 6
Step-by-step explanation:
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Answer:
The numbers are: 1 and 3.
Step-by-step explanation:
Let the first number be and the second number be .
Given: The difference between twice the number and the second number is . writing this mathematically,
From the second statement we get:
Solving for and we get:
and
Thus the first number is 1 and the second number is 3.
Answer:
The identity element of Q is 0, and 0 ∈ Z. Finally, if n ∈ Z, its additive inverse in Q is −n. But −n is also an integer, so Z is closed under taking inverses. Therefore,Z is a subgroup of Q.