Question

Va roogg!! Dau 50 de puncte si coroana!!
Rezolvati in Q ecuatiile:​

Answer 1

Explicație pas cu pas:

c)

$\frac{x}{3} - \frac{1}{5} = \frac{4x}{15} - \frac{2}{5} \\ 5x - 3 = 4x - 6 \\ 5x - 4x = - 6 + 3 \\ x = - 3$

d)

$\frac{3x + 1}{2} - \frac{x - 3}{4} = \frac{7}{4} - \frac{2x + 5}{3} \\ 6(3x + 1) - 3(x - 3) = 21 - 4(2x + 5) \\ 18x + 6 - 3x + 9 = 21 - 8x - 20 \\ 15x + 15 = - 8x + 1 \\ 15x + 8x = 1 - 15 \\ 23x = - 14 \implies x = - \frac{14}{23}$