Question

daca X x(y-z)=2,4 si X x(z+t)=3,1 calculati: X x 2,4 x(y+t)

Answer 1

xy-xz=2.4 si xz+xt=3.1
xy=2.4+xz si xz=3.1-xt
rezulta ca xy=2.4+3.1-xt=5.5-xt
xy:x=5.5-t ; y=5.5-t