Alright, lets gets tarted.
Suppose there are x rows of tomato plants Krystyn make.
Again suppose there are n plants in each row.
We could find total plants by multiplying number of plants in each row with number of rows.
Hence total number of plants will be =
![x * n](https://img.qammunity.org/2019/formulas/mathematics/high-school/ayjuzr9m5lnk8gsyiuy76uih2lyl07noju.png)
But as per question, total number of plants are 54. It means
![x * n = 54](https://img.qammunity.org/2019/formulas/mathematics/high-school/byh65taojkml3k5htsmmq67bayeih4m2mb.png)
Now, the number of plants in each row was 3 more than the number of rows means
![n = x + 3](https://img.qammunity.org/2019/formulas/mathematics/high-school/wwdg5tvbjuwt6imin62kz7hxwkpypm1785.png)
Putting this value of n in first equation we made
![x * (x+3) = 54](https://img.qammunity.org/2019/formulas/mathematics/high-school/dn12lzom8qho4da1ci0mgaeyirxjvv2f1b.png)
![x^(2) + 3x = 54](https://img.qammunity.org/2019/formulas/mathematics/high-school/nn1f6d1nyjskbc4o0aefrf8aaffxrysdc6.png)
Subtracting 54 in both sides
![x^(2) + 3x - 54 = 54 - 54](https://img.qammunity.org/2019/formulas/mathematics/high-school/p33hdddd6f6qclp5td2m7surryebtjrdp2.png)
![x^(2) + 3 x - 54 = 0](https://img.qammunity.org/2019/formulas/mathematics/high-school/wgg4g0bdxdprsbkuj0vwippqqopj2f94br.png)
Factoring
![(x-6)(x+9) = 0](https://img.qammunity.org/2019/formulas/mathematics/high-school/idw2dzkwdh4cv5o5sla9188pqusmvm3vv5.png)
Means x = 6 or x = -9
The number of rows can not be negaive.
Hence x = 6
It means number of rows of tomato plants will be 6. : Answer
Hope it will help :).