Siara is baking biscuits for a bake sale. Each batch makes 75 biscuits, and her friend gives her another 60 biscuits. She ends up with 360 biscuits total for the bake sale. Use algebra to solve for how many batches she made. (1 point)
Let x be the number of batches Siara made.
Siara made x * 75 biscuits.
After her friend gives her another 60 biscuits, she has x * 75 + 60 = 360 biscuits.
x * 75 + 60 = 360
x * 75 = 360 - 60
x * 75 = 300
x = 300 / 75
x = <<4=4>>4
Siara made 4 batches. Answer: \boxed{4}.