1.Jika diketahui f(x)= x-3/x+2 hitunglah f(a) 2.selesaikanlah sistem berikut secara aljabar 3x + 2y =2 x - y =9

1.
f(x) = x-3/x+2
*f(a) = a-3/a+2

2.
3x + 2y = 2
(x - y = 9) (2) >> 2x - 2y = 18
(3x +2y = 2)+(2x - 2y = 18)
>> 5x = 20 >> x = 4

* 2x - 2y = 18 >> 2(4) - 2y = 18
[tex]y = \frac{18 - 8}{ - 2} [/tex]
y = -5

(1) 3x + 2y = 2 >> 3(4)+2(-5) = 2
(2) x - y = 9 >> (4) - (-5) = 9