Preserve 4528

Mom bought one tin of beef and two pies for dinner. She paid a total of CZK 41 for it. Another lady bought two canned beef and five pates and paid CZK 88. How many kroner does a preserve cost, and how much pate?

Correct answer:

a =  29
b =  6

Step-by-step explanation:


a+2b = 41
2a +5b = 88

a+2·b = 41
2·a +5·b = 88

a+2b = 41
2a+5b = 88

Pivot: Row 1 ↔ Row 2
2a+5b = 88
a+2b = 41

Row 2 - 1/2 · Row 1 → Row 2
2a+5b = 88
-0.5b = -3


b = -3/-0.5 = 6
a = 88-5b/2 = 88-5 · 6/2 = 29

a = 29
b = 6

Our linear equations calculator calculates it.



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