Name: David Dean
Question: Not a formula but I can show you a process that you can use. One way to find a is to find a way to eliminate b. In the first equation the coefficient of b is 1 and in the second equation the coefficient of b is 3. Hence, if you multiply both sides of the first equation by 3 then, in both equations, the coefficient of b will be 3. The equations are 3a + 3b = 6.59 and multiplying the first equation by 3 gives 3a + 3b = 6.59 Subtracting the second equation from the first equation gives Solve for a. Cheers,Harley
