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Daniella Spencer
Mathematics
10 November, 14:38
The sum of twice a number b and 3 is 18
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Kaia
10 November, 14:57
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The answer i believe is 6.
6+3=9
9*2=18
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Michelle
10 November, 15:00
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In this question all the required information's are already provided. Only thing is understanding the trick within the question. it is said that the addition of twice an unknown number "b" with 3 is equal to 18. Based on this information the answer to the question can be very easily deduced ...
On the basis of the information's provided, we can write the equation as
2b + 3 = 18
2b = 18 - 3
2b = 15
b = 15/2
= 7.5
So the value of b or the unknown number is 7.5.
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