Answer:
<em>Total cost=$73.60
</em>
Step-by-step explanation:
<u>Arithmetics To Solve Simple Problems
</u>
Sometimes the use of the most basic operations can be handy to solve problems of a variety of complexities without the use of equations or algebra. We'll approach to the solution of this question by pure logic and basic operations.
If the gift was originally meant to be paid for all 5 brothers, each one would have paid one-fifth of the cost. But since the younger brother won't be paying anything, the cost will be divided among the other four brothers, each one of which will pay now one-fourth of the cost. But this new division is $3.68 more than the previous one. If we take the difference between both fractions, we get

That fraction is the portion of the money they are paying in excess, so the total cost should be twenty times that excess, i.e.
Total cost= 20*3.68=$73.60
Let's check. Each brother should have paid $73.60/5=$14,72. But the four brothers really paid $73.6/4=$18.40. The difference is cost is $18.40-$14,72=$3.68 as required
Yes, on the left side you are adding 3x+2 in one and 2+3x in the other. these add to the same number because addition is Commutative on the real numbers.
Step-by-step explanation:

Answer:
Trish made 2 pans of brownies
Step-by-step explanation:
So essentially 84/12 is 7 pans if Rachel made 5 pans and we know that using subtraction we can easily solve this by subtracting 7 and 5
Answer:
The solution to the equation is 
Step-by-step explanation:
To solve the equation, first we apply the distributive property on the parenthesis, then we isolate x.
Solution:

Applying the distributive:


Solving for x




The solution to the equation is 