Question

Va rog sa mi.o rezolvati pt ca nu stiu
Problema: Stiind ca x-2•y+13=52,determinati 3•x-6•y+1

Answer 1

x-2•y+13=52⇒  x-2y=52-13⇒ x-2y=39

3•x-6•y+1   dam factor comun pe 3 in primii 2 termeni
⇒3(x-2y)+1  dar x-2y=39    deci   
3•x-6•y+1 =3(x-2y)+1 =3×39+1=117+1=118
deci 
3•x-6•y+1 =118

Answer 2

x-2y=39⇒x=2y+39;
⇒3[2y+39]-6y+1
⇒6y+117-6y+1⇒se reduce 6y cu 6y;
⇒117+1=118;