Question

D = {x € N:3x + 5 < 31}​

Answer 1

Answer:

8

Step-by-step explanation:

D = {x € N:3x + 5 < 31}

We know that x is a natural number

$3x + 5 \leqslant 31 \\3x \leqslant 31 - 5 \\3x \leqslant 26 \\x \leqslant 26 \div 3 \\ x \leqslant 8.67 \\ x = 8$