Question

2 times a number minus 3 is 15 .What is the value of the number

Answer 1

Let's take the number to be y.

Here, we are told that 2 times a number minus 3 is 15

i.e 2 * y - 3 = 15

Now let's find y:

$(2\text{ }\ast\text{ y) - 3 = 15}$

To find y, first add 3 to both sides of the equation:

$(2\ast\text{ y) - 3 + 3 = 15 + 3}$$2\text{ }\ast\text{ y = 18}$

Divide both sides of the equation by 2:

$\frac{2\text{ }\ast\text{ y}}{2}\text{ = }\frac{18}{2}$$y\text{ = 9}$

The value of the number is 9