Jika (a,b) merupakan solusi dari spldv,5x + 3y =15 dan 3y - x = 3 maka 3ab =........ Plissss bantu jawab

jawab

5x + 3y = 15
-x + 3y = 3 ...|| (-)

6x = 12
x = 2

5x + 3y = 15
5(2) + 3y = 15
3y= 5
y = 5/3
nilai 3(ab) = 3 (2)(5/3) = 10