a)x+y=720
x=y+260 x= l----l+260
y+260+y=720 y= l----l }720
2y=720-260 2y=720-260=460
2y=460 y=460:2; y=230
y=460:2 x=720-230=490
y=230
x+y=720 inlocuim pe y
x+230=720
x=720-230
x=490
b)
x+y=435
x=y-19 x= l----l-19
y-19+y=435 y= l----l
2y=435+19 2y=435+18=454
2y=454 y=454:2=227
y=454:2 x=435-227=208
y=227
x+y=435 inlocuim pe y
x+227=435
x=435-227
x=208
Am incercat ulterior sa-ti fac si cu segmente!
