Question

lif 2X+20=K,which of these is X+9​

Answer 1

Answer:

$2x + 20 = k \\ x + 10 = \frac{k}{2} \\ x + 9 = \frac{k}{2} - 1 \\ =x + 10 = \frac{k - 2}{2}$

Hope it helps you mate