1) -20a+40+18a при a=50; 2) 9,4b-13-10b при b=15;

Question

1) -20a+40+18a при a=50; 2) 9,4b-13-10b при b=15;

Answer 1

1)(-20*50)+40+(18*50)=
-1000+40+900=
-1000+940=
-60
2)(9,4*15)-13-(10*15)=
141-13-150=
141-163=
-22