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joja [24]
2 years ago
15

I think of a number. I add 3 then divide it by 2. My answer is 12. Form an equation and solve it to find my number.

Mathematics
2 answers:
Sunny_sXe [5.5K]2 years ago
7 0

Answer:

21

Step-by-step explanation:

21 plus 3 equals 24 divided by 2 equals 12

Scilla [17]2 years ago
7 0

Answer:

The answer is 21.

Step-by-step explanation:

21+3 equals 24, and 24 divided by 2 equals 12. And 12x2 equals 24. :)

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vesna_86 [32]

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3 0
2 years ago
4(5x + 9)^2 – 33 = -21
ozzi

Answer:

x = sqrt(3)/5 - 9/5 or x = -9/5 - sqrt(3)/5

Step-by-step explanation by completing the square:

Solve for x over the real numbers:

4 (5 x + 9)^2 - 33 = -21

Add 33 to both sides:

4 (5 x + 9)^2 = 12

Divide both sides by 4:

(5 x + 9)^2 = 3

Take the square root of both sides:

5 x + 9 = sqrt(3) or 5 x + 9 = -sqrt(3)

Subtract 9 from both sides:

5 x = sqrt(3) - 9 or 5 x + 9 = -sqrt(3)

Divide both sides by 5:

x = sqrt(3)/5 - 9/5 or 5 x + 9 = -sqrt(3)

Subtract 9 from both sides:

x = sqrt(3)/5 - 9/5 or 5 x = -9 - sqrt(3)

Divide both sides by 5:

Answer:  x = sqrt(3)/5 - 9/5 or x = -9/5 - sqrt(3)/5

7 0
3 years ago
Read 2 more answers
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