ARITHMETIC ANALYSIS LAB2

a=[1 2 3;2 3 1;3 2 1]
b=[26;34;42]
i=1;
odigos=a(1,1);
%svinw to a(2,1)
mul = -a(2,1)/odigos;
%metasx_1=mul+1st_eq +2nd_eq
metasx_b1 = mul*b(1)+b(2);
metasx_a1=mul*a(1,:)+a(2,:);
%svinw to a(3,1)
mul = -a(3,1)/odigos;
%metasx_1=mul+1st_eq +2nd_eq
metasx_b2 = mul*b(1)+b(3);
metasx_a2=mul*a(1,:)+a(3,:);
new_a=[a(1,:);metasx_a1;metasx_a2];
new_b=[b(1);metasx_b1;metasx_b2];


mul= -new_a(3,2)/new_a(3,:);
metasx_b3 = mul*new_b(2)+new_b(3);
metasx_a3=mul*new_a(2,:)+new_a(3,:);

a=[1 2 3 ;0 -1 -5;0 0 12]
b=[26;-18;36]
i=3;
x3=b(i)/a(i,i)
x3=b(3)/a(3,3);
x2=x3 + 18;
x1=26-2*x2 +3*x3 ;