Question

помогите !! срочно !!

Answer 1

$\sqrt{100-9x} =8 \\ \\ 100-9x=64 \\ \\ -9x=-36 \\ \\ 9x=36 \\ \\ x= \frac{36}{9} \\ \\ x=4$

Answer 2

$\sqrt{100-9x}=8 \\ 100-9x=64 \\ -9x=-36 \\ x=4$