Răspunsuri

2014-10-18T18:56:49+03:00
B)5-x+7=9
5-x=9-7
5-x=2
x=5-2
x=3

(623-295)-x=70
328-x=70
x=328-70
x=258

57-(32+10+x)=10
57-(33+x)=10
33+x=57-10
33+x=60
x=60-33
x=27