Question

solve it. pls fast. and don't spam. pls answer fast. ​

Answer 1

Answer:

a+b

$a + b = 12 \: \: \: \: \: \: \: \: \: \: 1 \\ b + c = 36\3 \: \: \: \: \: \: \: 2 \\1 + 2 \\ a + 2b + c = 72 \div 3 \\ = a + 2 \times 4 + 7 = 24 \\ = a + 8 + 7 = 24 \\ a = 24 - 15 \\ = a = 9$