11
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The answer is the number that 'a' must be in order to make
the whole statement true. Here's how you can find it:
32 - a = 21
Add 'a' to each side:
32 = 21 + a
Subtract 21 from each side:
11 = a
Well, darling, 4 times what gives you 21? Simple math, my dear. The answer you're looking for is 5. Yes, 4 times 5 equals 20, not 21. But hey, close only counts in horseshoes and hand grenades, right?
21
67/21 = 3.190476 recurring (that is, 3.190476190476...)
21 can go into 66 three times, as 21 multiplied by 3 equals 63, which is the closest multiple of 21 to 66 without exceeding it. This is because 66 divided by 21 equals 3 with no remainder. Therefore, 21 can go into 66 exactly three times.
3x-6 = 21 3x = 21+6 x = (21+6)/3 x = 9 You shouldn't ask us to solve your math homework.