Question

15. Dacă a + b = 24 şi b+c=-15, calculați:
a) a + 2b +C;
b) 2a + 5b + 3c;
c) 3a + 7b + 4c.

Answer 1

a)

a+2b+c = (a + b) +( b + c) = 24 - 15 = 9

b)

2a + 5b + 3c = (a+ b) x 2 + (b + c) x 3

= 24 x 2 + (-15) x 3 =

= 48 - 45 = 3

c)

3a + 7b + 4c = (a+b) x 3 + (b+c) x 4=

=24 x 3 + (-15) x 4=

=72 - 60 = 12

…ᘛ⁐̤ᕐᐷฅ^•ﻌ•^ฅฅ^•ﻌ•^ฅ