Web Analytics

Snap Your Questions, Uncover the Solutions

contact us

Contact Info

Questions › Math

Math Asked by a SnapAndSolve user · about 1 hour ago

Solve by the method of your choice. 7x - 4y = 20 4x + y = 18 Select the correct choice below and, if...

Solve by the method of your choice.
7x - 4y = 20
4x + y = 18
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. The solution set is { }. (Type an ordered pair.)
B. There are infinitely many solutions. The solution set is {(x,y)|7x - 4y = 20} or {(x,y)|4x + y = 18}.
C. The solution set is ∅.

Answer

Solution: Solve the system of equations:

  1. 7x - 4y = 20
  2. 4x + y = 18

Multiply the second equation by 4 to eliminate y:

  1. 7x - 4y = 20
  2. 16x + 4y = 72

Add the equations:

23x = 92

x = 4

Substitute x = 4 into the second equation:

4(4) + y = 18

16 + y = 18

y = 2

The solution is (4, 2).

Correct choice: A. The solution set is {(4, 2)}.

Have a similar question?

Snap a photo of your homework and get a step-by-step answer in seconds. You can ask follow-up questions until it makes sense.

Solve my question free Math help Find a math tutor

More math questions

© 2026 SnapAndSolve

Math solver Physics solver Chemistry solver Homework helper