Final answer:
To make equation A equivalent to equation B, the number that needs to be added is 16.
Step-by-step explanation:
To make equation A equivalent to equation B, we need to find a number that, when added to 3 and 5, equals 24. Let's solve for x:
Equation A: 3 + 5 = 8
Equation B: (3 + 5) + x = 24
Adding 3 and 5 gives us 8, so:
8 + x = 24
Subtracting 8 from both sides, we get:
x = 16
Therefore, the number that will make equation A equivalent to equation B is 16.
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