Question

только первый номер​

Answer 1

$a) : - 1.3 + (x - 4.8) = - 7.1 \ - 1.3 + x - 4.8 = - 7.1 \ x = - 7.1 + 6.1 \ x = - 1$

$b) : - frac{5}{7} - (m - 1) = frac{11}{14} \ - frac{5}{7} - m + frac{7}{7} = frac{11}{14} \ - m = frac{11}{14} - frac{2}{7} \ - m = frac{11 - 4}{14} \ - m = frac{7}{14} \ m = - frac{1}{2}$