diketahui a=1/3 , b=1/4 dan c=1/5 .Nilai dari a (b + 5c) adalah...

a = 1/3
b = 1/4
c = 1/5

a(b + 5c) = 1/3(1/4 + 5(1/5))
                = 1/3 (1/4 + 1)
                = 1/3 (1/4 + 4/4)
                = 1/3 x 5/4
                = 5/12