Question

If the sum of two numbers is 18 and their difference
is 12 then the two numbers are
​

Answer 1

Answer:

Given that ;

• Sum of two numbers = 18

Let ;

The two numbers be x & y

• x + y = 18

Also ,

Given that;

• Difference of two numbers = 12

x - y = 12

Solving :

Elimination Method :

x + y = 18

x - y = 12

-------------

2x = 30

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2x = 30

x = 30 / 2

x = 15

Hence ;

Substitute x value in any Equation :

x + y = 18

15 + y = 18

y = 18 - 15

y = 3

Proof :

Substitute both x & y Values :

x - y = 12

15 - 3 = 12