Question

Calculeaza m=?,n=?,p=?,r=?,s=? stiind ca m+n=12, m+p=14, m+r=16 ,m+s=18 si n+p+r+s =42.

Answer 1

m=4.5 asa am obtinut

Answer 2

m+n + m+p + m+r + m+s  = 12+14+16+18 =60 
m+m+m+m+ (n+r+s+p) = 60
4m + 42 = 60 /-42
4m=18 /:4
m= 4,5
4.5 + n = 12 => 12-4.5= 7,5 => n = 7,5
4,5 +p = 14 => 14 - 4,5 = 9,5 => p=9,5
4,5+ r = 16 => 16 - 4,5 = 11,5 => r= 11,5
4,5+s=18 => 18 - 4,5 = 13,5 => s=13,5