diketahui rumus fungsi fx = 7-2x Jika f(a) = -9 nilai dari a - 5 adalah

f(x) = 7-2x
f(a) = 7-2a = -9
-2a = -16
a = 8

a-5 = 8-5 = 3

f(x) = 7-2x

f(a) = 7-2a = -9
f(a) = -2a = -9-7
f(a) = a = -16/-2 = 8

a-5 = 8-5 = 3

Maaf jika ad kesalahan :)