Răspunsuri

2014-10-01T22:28:32+03:00
1) x+y+13=24
Scadem 13 peste tot:
x+y=11

19+(2*y)+(2*x)=19 + 2(x+y) = 19 + 2 X 11 = 19 + 22 = 41


2) (x+48)+(y+52)=200
x+y+48+52 = 200
x+y+100=200
Scadem 100 din ambele parti
x+y=100

200+y+x = 200 + 100 = 300

Bafta cu temele!
2014-10-01T23:03:37+03:00
1. x + y = 24 - 13
x + y = 11
2(x + y) + 19 = 2 * 11 + 19 = 22 + 19 = 41
2. (x + 48) + (y + 52) = 200
x + y = 200 - 48 - 52
x + y = 100
x + y + 200 = 100 + 200 = 300
2 3 2