Solve for n in the literal equation a(n−4)+3=bn.

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry

Can someone me with my math problem pls my teacher is on my back about this

Sandy is upgrading her internet service. fast internet charges $20 for installation and $52.45 per month. quick internet has free installation but charges $57.45 per month. part 1 out of 2 complete the equation that can be used to find the number of months after which the internet service would cost the same. use the variable x to represent the number of months of internet service purchased.