Write an equation and solve for the unknown number.

Question

Twice a number, increased by 3 is 7.

(1 point)
Responses

The number is 2.
The number is 2.

The number is 8.
The number is 8.

The number is 20.
The number is 20.

The number is 5.

Answer 1

Let x be the unknown number. The equation is:

2x + 3 = 7

Subtract 3 from both sides of the equation:

2x = 4

Divide both sides of the equation by 2:

x = 2

Therefore, the unknown number is 2.