The sum of two numbers is 58. The smaller number is 10 less than the larger number. What are the numbers?

Question

I must find both of the numbers.

Answer 1

x and 58-x are the numbers

x=58-x-10

x=48-x

x+x=48

2x=48

x=48/2

x=24

58-24=34

24 and 34 are the numbers, or...

x+y=58

x=y-10

substitute

y-10+y=58

2y-10=58

2y=58+10

2y=68

y=68/2

y=34

x=34-10

x=24 again