First, we need to find the greatest common factor of the expression. In this case, the GCF of 30x and 42x^2+48x is 6x.
So we can rewrite the expression as:
6x(5 + 7x)/(7x + 8)
Next, we can simplify the expression by canceling out the factors that are the same in the numerator and denominator.
We can cancel out the factor of x in the numerator and denominator:
6(5 + 7x)/(7 + 8/x)
And we’re done!