1. 2 (2x +1) + x = x + 2x + 18 2. 2x + x + 2x = 10 + x
2 answers:
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the first number must be between 1 and 10 (here is 3.3)
the power (here is 5) is an integer exponent of 10 that indicates how many places the decimal point must be moved to make equation true
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