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z = 8
2x+2y+5z=?
2× ( x+y ) + 5z =
= 2 × 11 + 5×8
= 22+40
=62
O seara buna.
z=8
2x+2y+5z=?
5z=8*5=40 2x+2y⇒2*(x+y)= 22+40=62