Question

5. Реши уравненение ×:17=17 49-×=28 64:×=4






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Answer 1

$\frac{x}{17} = 17 \: | \times 17 \\ x = 1 {7}^{2} \\ x = 289$

$49 - x = 28 \: | \: - 49 \\ - x = - 21 \:| \times ( - 1) \\ x = 21$

$\frac{64}{x} = 4 | \times x \\ 64 = 4x| \div 4 \\ x = 16$