Question

(85 Ştiind că:
a = (9 +8:2-9:3): 2
b = 7 – 15: (8 - 6:2)
c = (8 + 16): 3 + 3 x (18 – 4 x 3),
calculează: 5 xa + 3 xb-c=
8 x a + 6 xb - 2xC=​

Answer 1

Răspuns:

a=(9+8:2-9:3):2

a=(9+4-3):2

a=(13-3):2

a=10:2

a=5

b=7-15:(8-6:2)

b=7-15:(8-3)

b=7-15:5

b=7-3

b=4

c=(8+16):3+3x(18-4x3)

c=24:3+3x(18-4x3)

c=8+3x6

c=8+18

c=26

5a+3b-c=

5x5+4x3-26=

25+12-26=

37-26=11

8a+6b-2c=

5x8+4x6-2x26=

40+24-52=

64-52=12