Question

1/7(X-2.3)=5/14
solutia ecuatiei este
a)5/9
b)576/245
c)0.2
d)4.8

Answer 1

$\frac{1}{7} \times (x - \frac{23}{10} ) = \frac{5}{14} \\ \frac{x}{7} - \frac{23}{70} = \frac{5}{14} \\ \frac{x}{7} = \frac{5}{14} + \frac{23}{70} \\ \frac{x}{7} = \frac{25 + 23}{70} \\ \frac{x}{7} = \frac{48}{70} \\ 70x = 336 \\ x = \frac{336}{70} \\ x = 4.8$

Răspunsul este d) 4.8