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jasenka [17]
2 years ago
13

I think of a number and add one fourth of it to half of it and the result is twelve. What is the number I thought of?

Mathematics
1 answer:
belka [17]2 years ago
3 0

Suppose that the number u were thinking about is x thus :

\frac{1}{4} x +  \frac{1}{2} x = 12 \\

Multiply both sides by 4

4 \times ( \frac{1}{4} x +  \frac{1}{2} x) = 4 \times 12 \\

x + 2x = 48

3x = 48

Divide both sides by 3

\frac{3x}{3}  =  \frac{48}{3  }  \\

x = 16

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