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IRISSAK [1]
3 years ago
10

14d + 21 and 7(2d + 3)

Mathematics
2 answers:
Gennadij [26K]3 years ago
3 0

Answer:

the answer is 28d + 42

Step-by-step explanation:

multiply what's on the brackets them add

Vlada [557]3 years ago
3 0
Answer:
D can be any value

Explanation:
First, we apply the distributive property to 7(2d+3) by multiplying 7 by both values (this is to open up the parentheses)

7(2d+3)
=14d+21

Now, we learn that 7(2d+3)=14d+21, which is the same thing as 14d+21=14d+21.

14d+21=14d+21
14d-14d=21-21
0=0

Because we’ve reached 0=0, which is a true statement, and not a value for d, d can be any value and the statements will be true.

I hope this helps!
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