Question

Could someone just show me how to solve this? I don't want an answer, I would like to solve it on my own, I just don't know how to write an equation for this. Please help!

Answer 1

You would set up a ratio for the two known sides to equal the known side and x:

8/2 = 18/x

Cross multiply:

(2 * 18) = (8 * x)

Simplify:

36 = 8x

Solve for x by dividing both sides by 8:

x = 36/8

x = 4.5