Neagtive means go backwards or oposite
it takes away that many units
Answer:
600
Step-by-step explanation:
x+2x=1800
3x=1800
x=600
First set up a proportion because they are similar triangles:
9/3x-20 = (72+9)/(56+3x-20)
9/3x-20 = 81/3x+36
9(3x+36) = 81(3x-20)
27x+324 = 243x-1620
1944 = 216x
x = 9
