1. Tuliskan penyelesaian 6k-4/5 = 4 2. Selisih dua bilangan adalah 20, lima kali bilangan pertama dikurangi 3 kali bilangan kedua sama dengan 7
vhetha
1) 6k - 4/5 = 4 6k = 4 + 4/5 6k = 24/5 k = 24/5 : 6 k = 24/5 × 1/6 k = 24/30 k = 4/5
2) misal bil 1 = x bil 2 = y x - y = 20 ---> x = y + 20 5x - 3y = 7 5(y + 20) - 3y = 7 5y + 100 - 3y = 7 2y = 7 - 100 y = (-93)/2 y = (-46 ½) x = y + 20 x = (-46 ½) + 20 x = (-26 ½)
6k = 4 + 4/5
6k = 24/5
k = 24/5 : 6
k = 24/5 × 1/6
k = 24/30
k = 4/5
2) misal bil 1 = x
bil 2 = y
x - y = 20 ---> x = y + 20
5x - 3y = 7
5(y + 20) - 3y = 7
5y + 100 - 3y = 7
2y = 7 - 100
y = (-93)/2
y = (-46 ½)
x = y + 20
x = (-46 ½) + 20
x = (-26 ½)