apabila b-a/a+b= 3/11,maka a:b adalah

(b - a) / (a + b) = 3/11
11. (b - a) = 3. (a + b)
11b - 11a = 3a + 3b
8b = 14a
b/a = 14/8
a/b = 8/14
a : b = 8 : 14 = 4 : 7

Semoga bisa bantu ya

[tex] \frac{b - a}{a + b} = \frac{3}{11} \\ 11b - 11a = 3a + 3b \\ - 14a = - 8b \\ \frac{a}{b} = \frac{ - 8}{ - 14} = \frac{4}{7} [/tex]