6/(x-8)=2/(x+6)
times both sides by (x-8)(x+6)
6(x+6)=2(x-8)
distribute
6x+36=2x-16
minus 2x both sides
4x+36=-16
miinus 36 both sides
4x=-52
divide both sides by 4
x=-13
The side length is about 17.916
If your ratio is 1 : 50, then for every 1 ft of the model, you have 50 feet of actual church. Thus, if the model is 3.5 ft, then
1 / 50 = 3.5 / x
where x is the actual height of the church. Cross multiply and solve for x.
1 * x = 50 * 3.5
x = 175
Thus, the actual church is 175 ft
SOLUTION
Step1; Write out the given expression
Sep2: Solve the expression on the left hand side
Then equate to the right-hand side
Therefore
The coefficient is 5
The constant is -3
