To determine the correct equation that represents the level balance, we look for an equality where the products on each side of the equation balance each other.
Evaluating the given options:
-
(60)(10) = 10(60)
- This simplifies to 600 = 600 (True)
-
(60)(10) = 40(10)
- This simplifies to 600 = 400 (False)
-
(10)(60) = 15(40)
- This simplifies to 600 = 600 (True)
-
(15)(40) = 40(15)
- This simplifies to 600 = 600 (True)
Based on the evaluations, the equations that represent a level balance correctly are:
- (60)(10) = 10(60)
- (10)(60) = 15(40)
- (15)(40) = 40(15)
Since this question asks for "the equation" (singular) and multiple equations are valid, it seems to suggest an error in the question. If you need to select one, options 1, 3, or 4 are all correct representations of a level balance.
If you have to pick one, option 1, (60)(10) = 10(60) is a straightforward choice as it shows the property of equality clearly.