Question

if the sum and difference of two number is 35 and 7,find them

Answer 1

Let the numbers be a and b respectively.
According to the given problem,
a + b = 35 .......equation (1)
a-b = 7............ equation (2)
From equation (2), a=7+b
Substitute the value of a in equation (1).
7+b+b =35
7+ 2b =35
2b = 35-7
2b = 28
b = 28/2=14
And a = 14+7 =21

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Answer 2

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Here is the solution:

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Let one number be x

The other number is 35 - x

The difference is 7:

x - (35 - x) = 7

x - 35 + x = 7

2x - 35 = 7

2x = 35 + 7

2x = 42

x = 21

Find the numbers:

number = x = 21

The other number = 35 - x = 35 - 21 = 14

Answer: The two numbers are 21 and 14