Question

VA ROG DAU COONIŢA+10 PUNCTE

Answer 1

17.
$a) \frac{2x}{7} = \frac{3}{35} \\ 35 \times 2x = 7 \times 3 \\ 70x = 21 \\ x = \frac{21}{70} \\ x = \frac{3}{10}$


$b)\frac{x + 2}{15} = \frac{6}{5} \\ 5 \times (x + 2) = 15 \times 6 \\ 5x + 10 = 90 \\ 5x = 80 \\ x = \frac{80}{5} \\ x = 16$


$c)\frac{2x - 1}{4} = \frac{5 - 6x}{3} \\ 3 \times (2x - 1) = 4 \times (5 - 6x) \\ 6x - 3 = 20 - 24x \\ 6x + 24x = 20 + 3 \\ 30x = 23 \\ x = \frac{23}{30}$