41-28=13 questions, but you also have to do 41 and 28, so 15 questions
Answer:
x = 2 is incorrect
Step-by-step explanation:
The answer should be 3 instead of 4
Given:
The ratio of red and blue cubes is 4:7.
After adding 10 more red cubes the ratio of red and blue cubes is 6:7.
To find:
The number of blue cubes.
Solution:
The ratio of red and blue cubes is 4:7.
Let the number of red and blue cubes be 4x and 7x respectively.
After adding 10 more red cubes.
Number of red cubes = 4x+10
Then, the ratio of red and blue cubes is 6:7.
![\dfrac{4x+10}{7x}=\dfrac{6}{7}](https://tex.z-dn.net/?f=%5Cdfrac%7B4x%2B10%7D%7B7x%7D%3D%5Cdfrac%7B6%7D%7B7%7D)
![7(4x+10)=6(7x)](https://tex.z-dn.net/?f=7%284x%2B10%29%3D6%287x%29)
![28x+70=42x](https://tex.z-dn.net/?f=28x%2B70%3D42x)
![70=42x-28x](https://tex.z-dn.net/?f=70%3D42x-28x)
![70=14x](https://tex.z-dn.net/?f=70%3D14x)
Divide both sides by 14.
![5=x](https://tex.z-dn.net/?f=5%3Dx)
Now,
Number of blue cubes in the bag is
![7(5)=35](https://tex.z-dn.net/?f=7%285%29%3D35)
Therefore, the number of blue cubes is 35.
Answer:
X=4 Hope it helps Lol
Step-by-step explanation:
5*x-3-(21-x)=0
Step by step solution :
Step 1 :
Pulling out like terms :
1.1 Pull out like factors :
6x - 24 = 6 • (x - 4)
Equation at the end of step 1 :
Step 2 :
Equations which are never true :
2.1 Solve : 6 = 0
This equation has no solution.
A a non-zero constant never equals zero.
Solving a Single Variable Equation :
2.2 Solve : x-4 = 0
Add 4 to both sides of the equation :
x = 4
One solution was found :
x = 4