Answer:

Step-by-step explanation:
The given expression is :

It can be solved as follows :

So, the solution of the given expression is equal to
.
4x + 89.95 = 628.35 <== ur equation
4x = 628.35 - 89.95
4x = 538.40
x = 538.40 / 4
x = 134.60 <== the cost for each cavity filling
4p-7=13
After the first step which is combining like terms, so add the 3p and the single p together.
Next, the negative 7 turns to a positive when we exterminate it from one half of the equation and add it towards the second part.
4p-7=13
+7. +7
4p=20
Divide both sides by 4 to get the p alone.
4p=20
/4. /4
P=5
That is the answer to the entire equation, again though the first step answer is at the very top, i just felt like solving it for you as well.