2 answers
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divide each side by 30
a=b/30
a=b/30
Let's say the square footage of the living area, a, is 1500 sq ft. Now we can plug this value into the formula to find the minimum furnace output, b:
b = 30a
b = 30 * 1500
b = 45,000 BTU
So, for a house with a living area of 1500 sq ft, the minimum furnace output required would be 45,000 BTU.
Now, let's solve the formula for a:
b = 30a
Divide both sides of the equation by 30:
b/30 = a
So, the formula to solve for a would be a = b/30. Using this formula, if you have the value of b (furnace output in BTU's), you can calculate the square footage of the living area in the house.