Aflați x, y, z
a) x/2 =y/11 =z/7. c) x/5=y/3=z/7
X+Y+Z=80. X+2Y-Z=192
b)x/6=y/7=z/8. d) x/14=y/11=z/12
X+Y-Z=20. X+Y-Z=39
VA ROG! REPEDE