Question

The sum of two numbers is 4.3 and their difference is 1.3 . What are the number​

Answer 1

Step-by-step explanation:

Let the two numbers be x and y respectively.

now,

x+y=4.3 — eq. 1

x-y=1.3 — eq. 2

In eq. 1

x+y=4.3

x= 4.3-y

substitute this value of x in eq.2

So x-y=1.3

(4.3-y)-y = 1.3

4.3-2y = 1.3

4.3-1.3 = 2y

3= 2y

y= 1.5

Substitute the value of y in eq. 1

x+y=4.3

x+1.5 =4.3

x= 4.3-1.5

x=2.8

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Answer 2

Answer:

2.8 and 1.5

Step-by-step explanation:

Let the two numbers be x and y .

$x + y = 4.3 \: \: \: \: \: (1)\\ x - y = 1.3 \: \: \: \: \: (2) \\ \\ adding \: (1) \: and \: (2) \\ x + y = 4.3 \\plus \\ x - y = 1.3 \\ equals\: \\ 2x = 5.6 \\ x = \frac{5.6}{2} = 2.8 \\ substitute \: x = 2.8 \: in \: (1) \\2.8 + y = 4.3 \\ y = 4.3 - 2.8 \\ y = 1.5$

THEREFORE THE TWO NUMBERS ARE 2.8 AND 1.5 !

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