Question

va rog frumos din suflet dau puncte si coroana dau 30p si coroana
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Answer 1

Explicație pas cu pas:

3x+5y=100 =>3x=100-5y => 3x=5(20-y) => 5|3x => 5|x

x=0 => 5y=100 => y=20

x=5 => 5y=85 => y=17

x=10 => 5y=70=>y=14

x=15=>5y=55=>y=11

x=20=>5y=40=>y=8

x=25=>5y=25 => y=5

x=30 => 5y=10=>y=2

x=35=> 5y negativ (Fals)

2x+3y=51 => 2x=51-3y=>2x=3(17-y)=>3|2x => 3|x =>

x=0 => 3y=51=>y=17

x=3 => 3y=45 =>y=15

x=6 => 3y=39 => y=13

x=9 => 3y=33 => y=11

x=12=>3y=27 =>y=9

x=15=>3y=21=>y=7

x=18=>3y=15 => y=5

x=21=>3y=9 => y=3

x=24=>3y=3 => y=1

Nu mai continuam pt ca y€N

7x+9y=108=>7x=108-9y =>7x=9(12-y)=>9|7x => 9|x=>

x=0 => 9y=108=>y=12

x=9 => 9y=45 => y=5

x=18 => y negativ (fals)