Question

How x+10y and x+15 y happened

Answer 1

x+ 10y = 105.....1

x+ 15 y = 155............2

by subtracting 2 from 1

5y = 50

y = 10

by substituting this value in ¹

x + 10y = 105

x + 100 = 105

x = 5

x = 5. y = 10