Answer:i used a calculator 12000
Step-by-step explanation:12 × 10 × 10 × 10 = 12000
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Square numbers are numbers with an odd number of factors. For example, 1 and 4 are square numbers.
X = 36/5
Or x = 7.2
21 + x = 6x - 15
21 = 6x - 15 - x
21 = 5x - 15
21 + 15 = 5x
36 = 5x
36/5 = x
