Lengkapi bagan berikut. a. a + b + c = 83 (a - 7) : (b - 7)

Lengkapi bagan berikut. a. a + b + c = 83 (a - 7) : (b - 7) = 5 : 3 (b - 3) : (c - 3) = 11 : 9 a = ... b = ... c = ... b. (a + b) : (a - b) = 7 : 5 a : b = ... : ... (a^2 + b) : (a^2 - b^2) = ... : ... (a + b^2) : (a^2 - b) = ... : ...