Diketahui f(2x–3) = 4x–7, maka nilai dari f(17) – f (7) adalah…

Mungkin gini :
2x - 3 = 4x - 7
2x - 4x = 3 - 7
-2x = -4
2x = 4
x = 4/2
x = 2

(17.2) - (7.2) = 34 - 14 = 20

2x-3 = 4x-7
2x-4x = -7+3
-2x = -4
x = 2

17(2) - 7(2)
= 34 - 14 = 20