diketahui fungsi f, f (3×+1)=6×-5.nilai dari f (-5) adalah

3x + 1 = -5
3x = -6
x = -2

f(-2) = 6(-2) -5
f(-2) = -12 -5 = -17

jadi jawabannya -17

semoga membantu ya

f(3x+1) = 6x-5
3x+1 = x'
3x = x'-1
x = x'-1 / 3
f(x) = 6(x-1/3) - 5
f(x) = (6x-6)/3 - 5
f(x) = (6x-6) / 3 - 15/3
f(x) = 6x-6-15 / 3
f(x) = 6x-21/ 3
f(-5) = 6(-5)-21 / 3
f(-5) = -30-21 / 3
f(-5) = -51 / 3
f(-5) = -17