Question #fff8c

2 Answers
Jan 28, 2018

25 and 18

Explanation:

Let one number be x and other number be y

Then, x+y = 43...........(1)
and x-y = 7.................(2)

Add both the equations and we get,

2x=50
orx = cancel50^25/cancel2^1 = 25

Put the value of x in any of the above two equations to get the value of y

Let's put it in equation 1

25+y = 43
or, y = 43-25 =18

Jan 28, 2018

The first number is 18 and the second number is 25.

Explanation:

You can begin by writing this question algebraically.

x + y = 43

y = x + 7

We can combine these expressions.

x + ( x + 7 ) = 43

2x color(red)(cancel(color(black)(+ 7)- 7)) = 43 color(red)(-7)

color(red)((cancel(color(black)(2))color(black)(x))/cancel(2) = color(black)(36/color(red)(2))

x = 18

y = x + 7

y = 25

We can prove that x = 18 and y = 25 because x + y = 43, or 18 + 25= 43.