Question

a) stiind ca 3•x+2•x=17si 2•x +2•y=13 determinati x
b) x+2•y+z=17si x+y=10 determinati y+z

Answer 1

3•x+2•x=17si 2•x +2•y=13 determinati x
x+2•x+2•x=17
x+13=17
x=4

b) x+2•y+z=17si x+y=10 determinati y+z
x+y+y+z=17
10+y+z=17
y+z=7