Grain sowing area

According to the sowing plan, sugar beet and grain are to be sown on an area of 840 ha. The area sown with sugar beet should be three times larger than the area sown with grain. What area should the grain be on?

Final Answer:

o =  210 ha

Step-by-step explanation:


r+o= 840
r = 3o

r+o= 840
r = 3·o

o+r = 840
3o-r = 0

Pivot: Row 1 ↔ Row 2
3o-r = 0
o+r = 840

Row 2 - 1/3 · Row 1 → Row 2
3o-r = 0
1.33r = 840


r = 840/1.33333333 = 630
o = 0+r/3 = 0+630/3 = 210

o = 210
r = 630

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