18. diketahui f(x) =5x + 3,jika f(m) =33 dan f(4)=n maka nilai m+n adalah

langsung aja yy

f(m) = 5m + 3 → 5m + 3 = 33

f(4) = 5(4) + 3 → 20 + 3 = n

5m + 3 = 33
5m = 30
m = 6

20 + 3 = n
23 = n

maka m + n = 6 + 23 = 29

semoga berguna +_+