Question

Write an equation and solve for the unknown number. Twice a number, increased by 3 is 7.

Answer 1

Let's assume the unknown number is "x".

The equation for the given problem can be written as:

2x + 3 = 7

To solve for the unknown number, we need to isolate the variable "x" on one side of the equation.

Subtracting 3 from both sides:

2x + 3 - 3 = 7 - 3

Simplifying:

2x = 4

Finally, dividing both sides by 2:

2x/2 = 4/2

Simplifying again:

x = 2

So, the unknown number is 2.