10x - 35 + 3ax = 5ax - 7a Subtract 3ax from both sides
10x - 35 = 2ax - 7a Factor a out of the right side
10x - 35 = a (2x - 7) Divide both sides by (2x - 7)
\(\frac{10x - 35}{2x - 7}\) = a Switch the sides to make it easier to read
a = \(\frac{10x - 35}{2x - 7}\)
