Suatu fungsi f dinyatakan dengan f(2x - 3) = 4x + 5. Nilai dari f(-7) adalah............

f (2x - 3) = 4x + 5

f (2x - 3) = f (-7)
2x - 3 = -7
2x = -7 + 3
2x = -4
x = -4/2
x = -2

f (-7)
= 4 (-2) + 5
= -8 + 5
= -3