Stephanie planted a home garden. she planted 3 rows of tomatoes with 4 tomato plants in each row. she also planted squash in rows of 7 plants each.

if x represents the number of rows of squash she planted, which of the following equations can be used to find the total number of plants stephanie planted in her home garden?

a. y = 7x + 12
b. y = 7x + 7
c. y = 8x + 7