So, dimensional analysis will help with this
Hope this helps!
Answer:
Step-by-step explanation:
3y = -x + 2
y = -x/3 + 2/3
y - 0 = -1/3(x - 1)
y = -1/3x + 1/3
the flagpole is 12 ft
2.5 ft / 4 ft = 7.5 ft / x ft
2.5x = 30
2.5x/2.5 = 30/2.5
x = 12 ft