5(2-а)-(8-а) при а=18

Question

5(2-а)-(8-а) при а=18

Answer 1

5(2-a)-(8-a)=10-5a-8+a=2-4a,
2-4*18=2-72=-70.

Answer 2

5*(2-18)-(8*18)=224
1) 2-18= -16
2) 8*18=144
3) 5*(-16)= -80
4) -80-144=224

Comments

8-18