math
posted by kathryn .
The second of two numbers is 7 times the first. Their sum is 72. Find the numbers.

x = first number
7x = second number
x + 7x = 72
simplify and solve equation 
the larger of 2 #s is 5 less than twice the smaller. their sum is 43. find the #s

x = smaller number
2x  5 = larger number
x + (2x  5) = 43 
the ans is 16... x+2x5=43..... therefor 3x=48 then divide both sides by 3 to solve for x

9 ,63