That answer is 180. The formula is a=bh1/2
No solution because -9 +9 = 0 and 4x does not equal 3.5x.
Consider the given equation:

Cross multiplying in the given equation, we get

Applying distributive property which states
, we get


Adding '4' on both the sides, we get


Subtracting '10n' from both the sides of the equation, we get


Dividing by '-8' in both the sides of the equation, we get

Therefore, the value of 'n' is -1.