Răspuns:
b) 62
c) 75
e) 100
f) 2012
Explicație pas cu pas:
b) Daca 3x+6y+19=43 atunci 6y+3x = 43-19 adica 24 ⇒6y+3x+38 = 24+38
=62
c) Similar: 2x+2y=62-38=24 ⇒4y+4x+27=48+27=75
e) 3x+2y+4z=30⇒ 3x+2y+4z+43+27=100
f) x+3+y+4+z+5=12 ⇒x+y+z+12=12⇒x+y+z=0⇒x+y+z+2012=2012