Question

помогите решить пример

Answer 1

(39-6*1)+(19*1-18)=33+1=34
(39-6*2)+(19*2-18)=(39-12)+(38-18)=27+20=47

(15a-13)+(18a+16)=(15*1-13)+(18*1+16)=2+34=36
(15*2-13)+(18*2+16)=(30-13)+(36+16)=17+52=69
(15*3-13)+(18*3+16)=(45-13)+(54+16)=32+70=102