Question

resolva, no universo dos números naturais, a inadequação 5x-40<0

Answer 1

$5x - 40 < 0 \\ 5x < 40 \\ x < \frac{40}{5} \\ x < 8$

Answer 2

5X-40<0

5X<40

X<40/5

X<8

X∈N{0,1,2,3,4,5,6,7}