Question

The sum of two numbers is 2420 and the minus 1224 .What are two of the numbers?

Answer 1

Let the numbers be a and b.
then a+b=2420                 Eqn1
    &    a-b=1224                Eqn2

Adding Eqn1 and Eqn2

2a=2420+1224
2a=3644
a=3644/2
a=1822

Put value of a in Eqn1
1822+b=2420
b=2420-1822
b=598

Answer 2

let keep the sum of two numbers is X and y

x + y = 2420 ( equation 1 )

X - y = 1224 ( equation 2 )

if we solve this two equation you will get your answer.....

the methods to solve this equation is
a) substitution
b) elimination
c) cross multiplication

any one method you can use to solve this equation


I am using elimination method
the answer is

X = 3644
Y = 2420

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