Question

Rzolvati in multimea numerelor rationale ecuatia:
0,4x-1 intreg si 2/5=-2,44

Answer 1

0.4x - 1*2/5 = -2.44

0.4x - 7/5 = -2.44

0.4x - 1.4 = -2.44

0.4x = -2.44 + 1.4

0.4x = -1.04

x = -2.6

Answer 2

$\it 0, 4x - 1 \frac{2}{5} = - 2, 44 = = > \\ \\ \frac{4}{10} *x - \frac{7}{5} = - \frac{244}{100} = = > \\ \\ \frac{4}{10} *x = - \frac{244}{100} + \frac{7}{5} = = > \\ \\ \frac{4}{10} *x = - \frac{244}{100} + \frac{140}{100} = = > \\ \\ \frac{4}{10} *x = - \frac{104}{100} = = > \\ \\ \frac{4}{10} *x = - \frac{104}{100} = = > \\ \\ x = - \frac{104}{100} : \frac{4}{10} = = > \\ \\ x = - \frac{104}{100} * \frac{10}{4} = = > \\ \\ x = - \frac{26}{10}^{(2} = \frac{13}{5} = \boxed{ - 2, 6}$