19.
Substitution would be the simplest method of solution for which system?
(Points : 2)

5/3 x = 6y and 2x -3y = 8

y = 2x and x + y = 28

3x - 2y =18 and 4x + 5y =60

20.
The sum of two numbers is 110. Their difference is 28. What is the smallest of the two numbers?
(Points : 2)

56

41

69

55

Question

19.
Substitution would be the simplest method of solution for which system?
(Points : 2)
      
5/3 x = 6y and 2x -3y = 8

      
y = 2x and x + y = 28

      
3x - 2y =18 and 4x + 5y =60


20.
The sum of two numbers is 110. Their difference is 28. What is the smallest of the two numbers?
(Points : 2)
      
56

      
41

      
69

      
55

rogue · Answer

19) The second system.

rogue · Answer

20) Solve it like a system
x + y = 110
x - y = 28

x = y + 28 ----> x + y = 110
y + 28 + y = 110
2y + 28 = 110
2y = 82
y = 41

x+ y = 110
x + 41 = 110
x = 69

Choice 2) 41

anonymous · Answer

FOR 2nd question: x+y=110, 
x-y=28, by adding them:
2x=138
x=138/2=69
y=110-x=110-69=41
x=69, y=41