I NEED URGENT HELP WITH 18-21

Answer:. . . 18. x = 8√6. . . 19. x = 3. . . 20. x = 3√3. . . 21. x = 5/3Step-by-step explanation:You have already marked the correct relationships on the drawings. Finding the value of x is a matter of making use of those relationships.__18. As you show, x is the given side multiplied by √3, so is ... . . .x = (8√2)(√3) = 8√6__19. As you show, the given side is x multiplied by √2, so .... . . 3√2 = x√2. . . 3 = x . . . . . . . . . . divide by √2__20. As you show, the given side is x multiplied by √3, so .... . . x√3 = 9. . . x = 3√3 . . . . . . multiply by (√3)/3__21. As you show, .... . . 8x -10 = 2x. . . 6x -10 = 0 . . . . . subtract 2x. . . x - 10/6 = 0 . . . . divide by 6. . . x = 5/3 . . . . . . . . reduce the fraction and add it to both sdes