Question

What is the value of 15x if x = -8?

Answer 1

15x=11+8

15x =19

x=19/15

_________________________________________________________

The value of x is 7.

Explanation:

Given that:-

x + 8 = 15

To find:- The value of the expression:

Here we will use the transposition method.

We have to follow these steps:-

( i ) First of all, we have to identify the variables and the constants.

( ii ) Get the variable to one side of the equation. Maintain equation balance while calculating.

( iii ) Then solve the expression of both sides by using various mathematical operations. Simplify both sides.

As we have,

=> x + 8 = 15

Now subtract both sides by , we get

=> x + 8 - 8 = 15 - 8

Simplifying it further, we get

=> x = 7

Hence, the required solution is 7.

Answer 2

The value of 15x if x = -8 is -120.

Explanation:

To find the value of 15x, we need to substitute the value of x which is -8 in the given expression. Therefore, we can rewrite the expression as 15(-8). According to the order of operations, we need to perform the multiplication first. -8 multiplied by 15 gives us -120 as the final answer.

In mathematical terms, we can represent this equation as 15x = 15*(-8). Using the distributive property, we can simplify this equation to 15x = -120. This means that the value of 15x is equal to -120. We can also represent the equation as x = -120/15, which gives us the value of x as -8.

In simple terms, we can understand this as 15 groups of -8, which gives us a total of -120. This can also be thought of as -8 multiplied by 15, which again, gives us the answer -120. This can be seen as a repeated addition of -8, 15 times.

In conclusion, the value of 15x if x = -8 is -120. This can be easily determined by substituting the value of x in the given expression and following the order of operations. It is important to note that the value of x can greatly affect the final answer, and it is crucial to pay attention to details and follow the correct steps to arrive at the correct solution.