Question

Find two numbers if their sum is 7.2 and their difference is 2.7

Answer 1

4.95 and 2.25.

Step-by-step explanation: This is really long... (PLEASE TAKE NOTE THE INFO ISNT DIRECTLY WRITTEN BY ME).

Adding equations (1) and (2), we get

Therefore

x=4.95

Substituting value of x from (3) in (1), we get

y=2.25

From (3) and (4), the two numbers are 4.95 and 2.25.

Answer 2

4.95 and 2.25

Explanation:

x+y=7.2

x-y=2.7

Add equations

x+y + x-y= (2x-y+y)=2x

7.2+2.7=9.9

Therefore 2x=9.9 x=9.9/2=4.95

x=4.95

x+y=7.2

4.95+y=7.2

y=7.2-4.95=2.25

y=2.25