3m+35n+8(3m-n) при m+n=4

Question

3m+35n+8(3m-n) при m+n=4

Answer 1

3m+35n+8
(3m-n)3m+35n+24m-8n
27m+27n
27(m+n)
Подставляем
27*4=108
Ответ:108 

Answer 2

3m+35n+8(3m-n)= 3m+35n+24m-8n=3m+24m+35n-8n=27m+27n. Если m+n=4, тогда 27*4=108