Question

please solve this c question with solution.

Answer 1

hope
it helps

regards
Mohit Khairnar

Answer 2

Let AC = x cm then,
AB = (x+5) cm BC = (x+7) cm
Perimeter = AB+BC+AC
21 = x+5+x+7+x
21 = 3x + 12
3x = 21-12
3x = 9
x = 3