Question

write the algebraic expression of difference of two numbers is 15​

Answer 1

Solution:

You have incomplete information.

Let x be the first number
Let 15 - x be the second number.

Hope this will help.

Answer 2

Answer:

so the numbers are 57 and 42.

Step-by-step explanation:

Let the numbers be a and b. So a-b=15 where a is the larger number.

8 added to twice the greater number is 2a+8; 4 less than 3 times the lesser number is 3b-4.

These two quantities are equal so 2a+8=3b-4; rearranging this we get 3b-2a=12.

So now we have a system of two equations involving two variables a and b.

We can write b=a-15 and then substitute for b in the other equation:

3(a-15)-2a=12; 3a-45-2a=12, a=12+45=57, so b=57-15=42.

Let's see if this is right.

2a+8=122; 3b-4=122, so the numbers are 57 and 42.