2x+x-7+3x-20=87cm
6x-27=87
6x=114
x=19
Therefore the sides are:12cm, 38cm, and 37cm
Hope this helps i spent around fourty minutes trying to figure it out, but im still in my younger ages of highschool so yeah.
Answer:
f = (20 × 15) + (10 × 6)
Explanation:
You are just find how many fish are salt water and how many freshwater and adding them together. The total number of aquariums is irrelevant in this case.
I think it’s zero but the question is kid of confusing
There is no solution to this system of equations; they will never spend the same amount.
The system of equations would be

We want one of the variables to have the same coefficient; we will make the coefficients of p be the same. To accomplish this, we will multiply the top equation by 3 and the bottom equation by 2:

When we subtract the equations to cancel p, we also cancel d in the process, leaving us
0 = 8
Since this is never true, there is no solution to the system.