Question

stiind ca x+y+z+11=43 det val lui x,y,z;

b) daca 3 ori x+4 ori y+5 ori z+27=59,det 5 ori z+3 ori x+4 ori y

c)stiind ca x-2 ori y+13=52,det 3 ori x-6 ori y+ 1

Answer 1

a).  x+y+z+11=43  ⇒  x+y+z=43-11=32 ;
b).  3*x+4*y+5*z+27=59  ⇒ 5*z+3*x+4*y=59-27=32 ;
c).  x-2*y+13=52  ⇒  x-2*y=52-13=39
                            ⇒  3*x-6*y+1=3*(x-2y)+1=3*39+1=117+1=118 ;