Question

there is a number whose double is greater than its half by 45​

Answer 1

Answer:

there is a number whose double is greater than its half by 45

Answer 2

$let \: the \: number \: be \: x \\ 2 \times x = \frac{x}{2} + 45 \\ 2x = \frac{x + 90}{2} \\ 2 \times 2x = x + 90 \\ 4x = x + 90 \\ 4x - x = 90 \\ 3x = 90 \\ x = \frac{90}{3} = 30$