Question

The sum of two numbers is 22 their difference is 4

Answer 1

Sum: 13+9=22
Difference: 13-9=4

x-y=4
x=4+y

x+y=22
4+y+y=22
4+2y=22
2y=18
y=9

x+y=22
x+9=22
x=13

Answer 2

x=13

Explanation:

ok so let x+y=22

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x and y are the 2 unkown Number

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x-y=4

their difference is 4

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add both equations

(x+y=22)

+(x-y=4)

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y's cancel out

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2x=26

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x=13