Question

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

Answer 1

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

Answer 2

yep ive got that!

Answer 3

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

Answer 4

how did you solve that @chronics

Answer 5

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

Answer 6

thanks