Question

Doar pe a,va rog!
Dau coroana​

Answer 1

Explicație pas cu pas:

$\frac{3}{4} (5( \frac{2}{3} - x) + \frac{3}{2} ) = \frac{7x}{2} \\ \frac{3}{2} (5 \times \frac{2 - 3x}{3} + \frac{3}{2} ) = 7x \\ \frac{3}{2} ( \frac{10 - 15x}{3} + \frac{3}{2} ) = 7x \\ \frac{3}{2} \times \frac{(20 - 30x + 9)}{6} = 7x\\ \frac{3}{2} \times \frac{(29 - 30x)}{6} = 7 x \\ 87 - 90x = 84x \\ 87 = 174x \\ x = 0.5$