Twice the sum of a number and 4 is less than 12

Let the number be x.

2 * (x + 4) < 12

2x+8 < 12

2x < 12-8

2x < 4 Divide both sides by 2.

x < 4/2

x< 2. Therefore the number is less than 2.

Twice the sum of a number and 4 is less than 12 can be written as:

2 (x + 4) < 12

Of course it can be also solved:

2 (x + 4) < 12

2 * x + 2 * 4 < 12

2x + 8 < 12 / - 8 (both sides)

2x < 4 / : 2 (both sides)

x < 2

So the number we're looking for should be less than 2.