Ask Question
16 October, 19:12

Solve each system by substitution:

3x+y=2

4x+y=20

How do I solve this and set this up

+3
Answers (2)
  1. 16 October, 19:31
    0
    Solve the first equation for y.

    3x+y=2

    y=2-3x

    Substitute

    4x + (2-3x) = 20

    4x+2-3x=20

    x=18
  2. 16 October, 20:42
    0
    So you want to isolate one of the variables in one of the equations. Using the first equation, we can make 3x+y=2 y=2-3x.

    Then plug y=2-3x into the second equation:

    4x + (2-3x) = 20

    Then solve.

    x+2=20

    x=18

    Finally, plug the x value back into any of the two equations to find y. This is essential to get full credit!

    4 (18) + y=20

    72+y=20

    y = - 52

    x=18

    y = - 52
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “Solve each system by substitution: 3x+y=2 4x+y=20 How do I solve this and set this up ...” in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers