Question

Va rog nu am fost atent in clasa…..

Answer 1

Răspuns:

a) x+y=24-13 19+2(y+x) =19+2×11=19+22=41

x+y=11

b) 2(x+y) =59-45 4(y+x) +32=4×7+32=28+32=60

2(x+y) =14

x+y=14:2

x+y=7

c) x+3y=54-18 2(3y+x) +89=2×36+89=72+89=161

x+3y=36

d) x+y=200-(48+52) 200+100=300

x+y=200-100

x+y=100

e) x+y=124-75 101+49=150

x+y=49

f) 5x+7y=230-30 1000+7y+5x=1000+200=1200

5x-7y=200