Question

Cum se rezolva ecuaţia: x-8/21=5/7​ ,vă rog daca ştiţi explicati pas cu pas

Answer 1

$x - \frac{8}{21} = \frac{5}{7} \\ \\ x - \frac{8}{21} + \frac{8}{21} = \frac{5}{7} + \frac{8}{21} \\ \\ x = \frac{5 \times 3}{7 \times 3} + \frac{8}{21} \\ \\ x = \frac{15}{21} + \frac{8}{21} \\ \\ x = \frac{23}{21}$