Question 1089264
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<pre>
x + y = 198,
x - y =  18
-------------------Add the two equations (both sides) to get

2x = 198 + 18 = 216  ====>  x = {{{216/2}}} = 108.

Then y = 198 - x = 198 - 108 = 90.
</pre>

<U>Answer</U>. The numbers are 108 and 90.