Question

(x-15):(200-x)+15=9:11

Answer 1

(x-15):(200-x)+15=9:11

11×(x-15)=9×[(200-x)+15]

11x-165=1800-9x+9×15

11x-165=1800-9x+135

11x-165=1935-9x

11x+9x=1935+165

20x=2100

x=105