Question

20
1. 754/58=559/x
2. 243/x=30/10
3. 715/65=352/x
4. 42/14=x/84
5. 480/x=270/54
6. x/65=270/54
7. x/19=935/85
(можно только полными ответами)​

Answer 1

$1) \frac{754}{58} = \frac{559}{x} \\ x = \frac{559 \times 58}{754} = \frac{32422}{754} = 43 \\ 2) \frac{243}{x } = \frac{30}{10} \\ x = \frac{243 \times 10}{30} = \frac{2430}{30} = 81 \\ 3) \frac{715}{65} = \frac{352}{x} \\ x = \frac{352 \times 65}{715} = \frac{22880}{715} = 32 \\ 4) \frac{42}{14} = \frac{x}{84} \\ x = \frac{42 \times 84}{14} = \frac{3528}{14} = 252 \\ 5) \frac{480}{x} = \frac{270}{54} \\ x = \frac{480 \times 54}{270} = \frac{25920}{270} = 96 \\ 6) \frac{x}{65} = \frac{270}{54} \\ x = \frac{270 \times 65}{54} = \frac{17550}{54} = 325 \\ 7) \frac{x}{19} = \frac{935}{85} \\ x = \frac{935 \times 19}{85} = \frac{17765}{85} = 209$