this lession is labled number and age. I dont have any aditional information
the sum of two numbers is 16. their differnce is 0. what are the two numbers?
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If you have two numbers added together, but can be subtracted to be zero, then the two numbers must be the same.
Here's an example:
1+1 =2, but 1-1 = 0!
So, to answer your question,
8+8 = 16, and 8-8 = 0!
Data: x+y=16 and x-y=0 ==> x=y ============================================================== I going to substitude x on y, because x=y Substituing: x+y=16 ==> x+x=16 ==> 2x=16 ==> x=16/2 ==> x=8 ============================================================= Pruve: x+y=16 if x=y and x=8, then y=8 subtituing their value 8+8=16 ==> 16=16