Jika (a + b) : (a - b) = 7 : 3, maka a : b! #bantuinjawabpakecara

(a + b) : (a - b) = 7 : 3

[tex] \frac{a + b}{a - b} = \frac{7}{3} \\ \\ 3(a + b) = 7(a - b) \\ 3a + 3b = 7a - 7b \\ 3a - 7a = - 7b - 3b \\ - 4a = - 10b \\ \frac{a}{b} = \frac{ - 10}{ - 4} \\ \\ \frac{a}{b} = \frac{5}{2} [/tex]
Maka, a : b = 5 : 2