The Sum Of Two Numbers Is 29. The Difference Between The Same Two Numbers Is 17. What Are These Two Numbers?

Suppose the two numbers are x and y. According to the question;

x+Y=29 EQ1
x-y=17 EQ2

x=y+17 EQ3
put in the first equation
y+17+y=29
2y+17=29
2y=29-17
2y=12
y=12/2
y=6
Put the value of y in EQ3
x=y+17
x=6+17
x=23

so two numbers are 23 and 6

23,6

23 and 6

12