Question

varog sunt nou faceti o fapta bua dau corona

Answer 1

3. x = 3; y + z = 10.

a) 7x + 7y + 7z = 7 · (x + y + z) = 7 · 13 = 91.

b) 17x + 17y + 17z - 10 = 17 · (x + y + z) - 10 = 17 · 13 - 10 = 221 - 10 = 211.

c) 5x + 10y + 10z = 5 · 3 + 10 · (y + z) = 15 + 10 · 10 = 15 + 100 = 115.

d) 100 · x - (9y + 9z) = 300 - [9 · (y + z)] = 300 - (9 · 10) = 300 - 90 = 210.

/robertinni