Since the triangles are similar, all sides are proportional by the same scale factor. The relationship between the bases 32 and 8 is 4 (32/8 = 4). This means that the smaller triangle need to be multiplied by a scale factor 4 to result in the bigger triangle. This means that 4x + 12 is 4 times greater than 15. The equation to solve for x can be written as: 4x + 12 = 4*15 Now just solve for x as u normally would 4x + 12 = 60 (Subtract twelve from both sides) 4x = 48 (Divide both sides by 4 to isolate x) x = 12
I hope this somewhat helped :) Was my explanation clear enough?
