1.

What should be added to thrice the rational number, -5/2 to get 2/7?

Answer»

Step-by-step EXPLANATION:

let \: other \: number \: be \: x \: \\ then \\ x + 3 \times ( \frac{ - 5}{2} ) = \frac{2}{7} \\ x + ( \frac{ - 15}{2} ) = \frac{2}{7} \\ x = - (\frac{ - 15}{2} ) + \frac{2}{7} \\ x = \frac{15}{2} + \frac{2}{7} \\ x = \frac{105 + 4}{14} \\ x = \frac{109}{14} \\ x = 7 \frac{11}{14}

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