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Answer:
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Step-by-step explanation:
Twice a number decreased by 2 is 40. What is the number ?
Equation: 2x - 2 = 40
Solution: 2x - 2 = 40
2x - 2 = 40 + 2
2x = 40 + 2
2x = 42
2 = 2
X = 21
Check: 2x - 2 = 40
2(21) - 2 = 40
42 - 2 = 40
40 = 40
Therefore, the number is 40