Who here is good at algebra??

Bring the fraction a/a-4 to a denominator of 16-a^2

The customer price index(cpi), which measures the cost of a typical package of customer goods, was 208.8 in 2011 and 244.1 in 2016.let x=11 corresponding to the year 2011 an estimate to cpi into 2013 and 2014. assume that the data can be modeled by a straight line and the trend to continue idenfinitely. use data points to find such a line and then estimate the requested quantities

What is the value of x in the equation7x+2y=48 when y=3