Question

Ajutatima URGENT VA ROG!!! a) Stiind ca x+y+z+11=43, determinati valoarea lui x+y+z b) Daca 3•x+4•y+5•z+27=59, determinati 5•z+3•x+4•y c) Stiind ca x-2•y+13=52, determinati 3•x-6•y+1

Answer 1

a)x+y+z=43-11=32
b)5z+3x+4y=59-27=32
c)x-2y=39 I·3⇔3x-6y=117 I+1⇔3x-6y+1=118

Answer 2

a. x+y+z+11=43⇒x+y+z=43-11⇒x+y+z=32;
b. 3x+4y+5z+27=59⇒3x+4y+5z=59-27⇒3x+4y+5z=32;
c. x-2y+13=52⇒x-2y=52-13⇒x-2y=39⇒x=2y+39;
⇒3x-6y+1
⇒3[2y+39]-6y+1
⇒6y+117-6y+1⇒se reduce 6y cu 6y
⇒117+1=118;