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Mr. Vávra sows wheat and rye for a total of 28 ha. Rye sows two and a half times the area of ​​wheat. How many ha sow wheat and how much rye?

Correct answer:

p =  8
z =  20

Step-by-step explanation:


p+z=28
z = 2.5·p

p+z = 28
2.5p-z = 0

Pivot: Row 1 ↔ Row 2
2.5p-z = 0
p+z = 28

Row 2 - 1/2.5 · Row 1 → Row 2
2.5p-z = 0
1.4z = 28


z = 28/1.4 = 20
p = 0+z/2.5 = 0+20/2.5 = 8

p = 8
z = 20

Our linear equations calculator calculates it.



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