Answer:
the numbers are 13 and 17
Explanation:
let the first number be a
let the second number be b
a+b=30.......a=30-b
a-b=4
substitute the first eq into the second one
30-b-b=4
30-2b=4
30-4=2b
26=2b
13=b
a=30-b
a=30-13
a=17
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