Ask Question
10 September, 12:20

Lena bought a total of 20 postcards. She bought 6 more large postcards than small. Write a system of equations that represents the postcards Lena purchased. Solve the system by substitution. Interpret the solution.

+5
Answers (1)
  1. 10 September, 15:14
    0
    X = small postcards

    y = large postcars

    x+y=20

    y=x+6

    x + (x+6) = 20

    x + x + 6 = 20

    2x = 20-6

    2x=14 / : 2

    x = 7. - - > the number of small postcards is 7.

    x+y=20

    7+y=20

    y=20-7

    y=13 - - > the number of large postcards is 13.

    also y=x+6 = 7+6=13.
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “Lena bought a total of 20 postcards. She bought 6 more large postcards than small. Write a system of equations that represents the ...” 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