Answer:
The number is 35.
Explanation:
Let the number be x
Twice the number: 2*x = 2x
Twice the number decreased by 20: 2x - 20
2x - 20 = 50
Add 20 to both sides
2x - 20 +20 = 50 + 20
2x = 70
Divide both sides by 2
2x/2 = 70/2
x = 35
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