maths

1.
-19+12

a+b+c
=(23+19+8)/2
=25

25-a-b
=25-23(a+b=23)
=2
c=2

25-b-c
=25-19(b+c=19)
6
a=6

25-c-a
=25-8(c+a=8)
=17
b=17

a=6 b=17 c=2

1. -2 + 3 - 9 + 7 + 2 - 8= -19 + 12

a+b=23 --------(1)
b+c=19 ---- b = 19 - c
c+a=8 ------ a = 8 - c

sub a,b into (1)

8 - c + 19 - c = 23
27 - 2c = 23
27 - 23 = 2c
4 = 2c
c = 2

sub c into last 2 formulas

b + 2 = 19
b = 17

2 + a = 8
a = 6

a=6 b=17 c=2

a+b=23 -----(1)
b+c=19 -----(2)
c+a=8 -------(3)

from (1),
a+b=23
then, a=23-b -----(4)

from (2)
b+c=19
then, c=19-b ----(5)

put (4) & (5) into (3)
--> (23-b) +(19-b) =8
b=17
a=23-b ---> a=6
c=19-b ---> c=2

1. -2 + 3 - 9 + 7 + 2 - 8= -19 + 12

a+b=23 --------(1)
b+c=19 ---- b = 19 - c
c+a=8 ------ a = 8 - c

sub a,b into (1)

8 - c + 19 - c = 23
27 - 2c = 23
27 - 23 = 2c
4 = 2c
c = 2

sub c into last 2 formulas

b + 2 = 19
b = 17

2 + a = 8
a = 6

a=6 b=17 c=2

a+b=23
a=23-b....(1)
b+c=19
c=19-b....(2)

SUB(1)and(2)
c+a=8
19-b+23-b=8
2b=34
b=17

so,,(1)--->a=23-b
a=6
(2)--------->c=19-b
c=2

***a=6,b=17,c=2

1. -19+12

b=23-a
b=19-c
c=8-a


so b=19-8+a
=11+a
and 23-a=11+a
a=6
b=17, c=2

a=6,b=17,c=2