Lines AB and AC are equal so you set up an equation like so... 4x + 1 = 2x + 23 Subtract 1 from both sides. 4x = 2x + 22 Subtract 2x from both sides. 2x = 22 Divide. x = 11 Now you need to plug in 11 into 3x - 8. 3(11) - 8 = 33 - 8 = 25 So BC is 25. I hope this helps love! :)
