It's the same as adding 2 fractions the product of 2 rational numbers is rational
3x + 8 = 3x - 5
3x - 3x + 8 = -5
8 = -5 (incorrect)
this means there is no solution, because whatever number u sub in for x, it will not come out true
The answer will be B , the second one
For this case we have the following functions:

Multiplying both functions, we obtain an expression equivalent to (mn) (x).
We have then:

Substituting values we have:

Rewriting the expression we have:
Answer:
An expression that is equivalent to (mn) (x) is:

The total cost is, $59.99 times 0.08=$4.79 (the tax) For the total: $59.99+$4.79=$68.78 in total