Question 512072
"The first number x is 1 less than twice the second number y" ___ x = 2y -1


"The difference of two numbers is 8" ___ x - y = 8


substituting the equivalent value for x from the 1st equation ___ (2y - 1) - y = 8
___ y = 9


substituting into the 2nd equation ___ x - (9) = 8
___ x = 17