22. Diketahui sistem persamaan:2x + 3y + z = 73x + y-Z = 2x-y+22=4​

Jawaban:

4(2x+3)-5x-=4

=8x+12-1=5x=4

=8x-5x+11+=4

3x+15

3x=15

x=15-3

x =3

semga bermafaat ya..