Answer:
Step-by-step explanation:
5x -x + 3x =30, first you combine like terms 5x + 3x-x=30
8x-x =30
8-1=7
7x=30
Let x be the unknown number. The equation is going to be 7/28=25/x, now we cross multiply. 7*x=25*28, 7x=700, divide both sides by 7 and you should get 100, So, x=100 and 7/28=25/100
x = 1/120
i did not see the comment about the 1/5 until now
hope this helps
Answer:

Step-by-step explanation:
Hello!
Let's use the square root property to solve this question
Solve:
The answer is option A: x = ±2√3