Write an equation and solve for the unknown number.
Twice a number, increased by 3 is 7.
The number is 2
The number is 8
The number is 20
The number is 5
Let's assume the unknown number is represented by "x".
The equation based on the given information is:
2x + 3 = 7
Now let's solve for x:
Subtract 3 from both sides of the equation:
2x = 4
Divide both sides by 2:
x = 2
Therefore, the unknown number is 2.