I see you're probably trying to use a math editor to present this problem. Unfortunately, I'm unsure how to decipher your "-\frac {a }{8.06)." What fraction are you speaking of?
Given "<span>#-\frac { a } { 8.06} + 7.02= 18.4#," all I can say with certainty is that you could legitimately subtract 7.02 from both sides:
</span><span>#-\frac { a } { 8.06} + 7.02= 18.4#
- 7.02 = -7.02
After I've heard back from you, I'll try to help you solve the entire problem.
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A 20 foot ladder is leaned against a wall. If the base of the ladder is 8 feet from the wall,how high up the wall will the ladder reach? so do 20^2 + 8^2=c2 so 20 times 20 is 400 +64 equals 464
Number 2 is a constant rate of change
