Răspuns :
1)a+b=350
a+10=2b
a=2b-10
2b-10+b=350
3b-10=350
3b=350+10
3b=360
b=120
a=2*120-10=240-10=230
2)a-b=480
a=4b
4b-b=480
3b=480
b=160
a=4*160=640
a+10=2b
a=2b-10
2b-10+b=350
3b-10=350
3b=350+10
3b=360
b=120
a=2*120-10=240-10=230
2)a-b=480
a=4b
4b-b=480
3b=480
b=160
a=4*160=640
1) a+2a-10 = 350
3a = 360 => a = 120
=> b = 230
2) 4a - a = 480
=> a = 160
=> b = 640