Question

a+a+a=30
b+b+a=30
b+b+c=9
a+b+c= ?
bantu jawab donk kaka2​

Answer 1

Jawaban:

9

Penjelasan dengan langkah-langkah:

a+a+a = 30

3a = 30

a = 30/3

a = 10

b+b+a= 30

2b + 10 = 30

2b = 30-10

2b = 20

b = 20/2

b = 10

b+b+c = 9

2b + c = 9

c = 9 - 2(10)

c = 9 - 20

c = -11

a+b+c

= 10 + 10 + (-11)

= 20 + (-11)

= 9