Question

write the numbers such that:
1)the sum of numbers is 20 and difference is 10

Answer 1

Step-by-step explanation:

x + y = 20.

"... and their difference is 10" can be translated mathematically as:

x - y = 10

Adding the two equations will eliminate the variable y:

x + y = 20

x - y = 10

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2x + 0 = 30

2x = 30

(2x)/2 = 30/2

(2/2)x = 15

(1)x = 15

x = 15