Question

resolva o sistema abaixo usando a regra de cramer.
x+y =107 
y+Z = 74
x+z = 91 

Answer 1

x+y=107
y+z=74
x=z=91

x+y+0z=107
0x+y+z=74
x+0y+z=91

=/1 1 0
 /0 1 1  =1+1+0-0-0-0=2
 /1 0 1 

x=/107 1 0
   /  74 1 1 =107+91+0-0-74-0=124
    / 91 0 1
  
y=/1  107  0
   /0     74  1=74+107+0-0-0-91=90
   /1     91  1


z=/1 1 107
   / 0 1   74=91+74+0-107-0-0=58
   /1   0  91
 x=124÷2=62
 y=90÷2=45
 z=58÷2=29