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Tamiku [17]
2 years ago
12

I need help, I am confused.

Mathematics
1 answer:
Ann [662]2 years ago
3 0

Answer:

is 21

Step-by-step explanation:

becuase 7-6 (the lCM) is 1 and 20 + 1 = 21

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\bf \begin{array}{lccclll}
&amount&concentration&
\begin{array}{llll}
concentration\\
amount
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