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
Let's represent the number of batches Siara made as 'b'.
We know that each batch makes 75 biscuits, so the total number of biscuits from the batches is 75*b.
Her friend gives her another 60 biscuits, so the total number of biscuits she has is 75*b + 60.
According to the problem, she ends up with 360 biscuits total, so we can write the equation as follows:
75*b + 60 = 360
Now we can solve for 'b':
75*b = 360 - 60
75*b = 300
b = 300/75
b = <<4=4>>4
Therefore, Siara made 4 batches of biscuits.