Question

1/3 (5a-7)- 1/2 (6b+7), при a= 2 1/4; b= 2/3
Помогите пожалуйста соч!!!

Answer 1

=
$\frac{5}{3} a - \frac{35}{6} - 3b \\ \frac{5}{3} \times \frac{21}{4} - \frac{35}{6} - 3 \times \frac{2}{3} = \frac{35}{4} - \frac{35}{6} - 2 = \frac{11}{12}$