the ratio of the length of an empty water tank to its width is 8:5. The ratio of its width to its height is 3:4. The tank is 20% full when 22500cm cube of water is poured in. what is the height of the tank in metres?

Simonne used the following steps to simplify the given expression. 12-3(-2x+4) step 1: 12+(-)+(-3)(4) step 2: 12+6x+(-12) step 3: 12+(-12)+6x step 4: 0+6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? •identity property of addition •inverse property of addition •associative property of addition •commutative property of addition