Question

Va rog, Dau coroană​

Answer 1

a) x+y+z+11=43 |-11 (scazai 11)

x+y+z=32

b) 3•x+4•y+5•z+27=59 |-27 (scazi 27)

3•x+4•y+5•z=32 = 5•z+4•y+3•x=32

c) x-2•y+13=52 |-13 (scazi 13)

x-2•y=39 |•3 (înmulțești cu 3)

3•x-6y=117 |+1

3•x-6y+1=118

Answer 2

Sper ca te am ajutat! :)