Add the Rational Expressions $\frac { 3 } { 5 x + 2 } + \frac { 5 } { 3 x + 7 }$

Short Answer

Add the rational expressions. Be sure to express your answer in simplest form. $\frac { 3 } { 5 x + 2 } + \frac { 5 } { 3 x + 7 }$