Question

5x+3(2x-7) помогите прошу

Answer 1

5х + 3(2х - 7) = 5х + 6х - 21 = 11х - 21


$frac{2}{3}*(-a)* frac{1}{2}=-a* frac{2*1}{3*2}=- frac{1}{3}a$