you can compare the length of sides of both the triangles...
Answer:
60
Step-by-step explanation:
(y - 18) = -3/2 (x - 12)
125% of 12 equals 15
75% of 18 equals 13 1/2
so the slope equals 4.5/-3 or -3/2
-6x and 5x are like terms.
-9 is a constant.
-2y is a term