The sum of two numbers in 30 and their difference is 12. Write two equations and find the numbers.

Question

ajprincess · Answer

Let us assume the numbers are x and y.
Sum of them is the addition of then.
so Sum = x+y
It is given that the sum is equal to 30.
so
x+y=30
difference is subtraction of a number from the other.
so
difference=x-y
it is given that the difference is equal to 12.
so
x-y=12.
so the required equations are 
x+y=30 and
x-y=12. getting it @oly.surf

anonymous · Answer

yep ive got that!

anonymous · Answer

x+y=30
x-y=12
on solving..
x=21 and y=9

anonymous · Answer

how did you solve that @chronics

anonymous · Answer

just add the two equations..y would cancel out and u get 2x=42 ..hence x=21..

anonymous · Answer

thanks