Question

Aflați a+a+a+a+b+c=107
B+c=43
B-c=27
A?
B?
C?​

Answer 1

Răspuns:

$a + a + a + a + b + c = 107 \\ 4a + 43 = 107 | - 43 \\ 4a = 64 | \div 4 \\ a = 16$

$b + c = 43 \\ b - c = 27 = > b = 27 + c \\ 27 + c + c = 43 | - 27 \\ 2c = 16 | \div 2 \\ c = 8 \\ \\ = > b = 27 + c = 27 + 8 = 35$