70-q-q-2q= 80
combine like terms first
so you get 70-4q= 80
subtract 70 on both sides and you get -4q= 10
divide -4 on both sides and you get q= 10/-4 or -2.5
Answer:
50ft
Step-by-step explanation:
let x=height of tree.
AB/DE = BC/EC
The ratio is == x/5 =120/12
x/5 = 10
x = 50
Height of tree is 50 ft.
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